CVE-2026-20127
📛 CVE Title
Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
Description
A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, and Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system. This vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric.
Description (MITRE) cveawg.mitre.org
Pulled from cveawg.mitre.org/api/cve/CVE-2026-20127 on 2026-06-30. Shown when MITRE's text differs from the cvelistV5 mirror.
A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system. This vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- cisco
- CVSS severity
- CRITICAL
- CVSS score
- 10.0 / 10
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H- Effective score
- 10.0 / 10 CRITICAL source: CNA overview
- CWE(s)
-
CWE-287 - Reserved
- 2025-10-08
- Published
- 2026-02-25 16:14 UTC
- Last updated
- 2026-02-26 14:44 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/20xxx/CVE-2026-20127.json
- Linked Threat
- CVE-2026-20127 — Cisco Catalyst SD-WAN Controller and Manager: Cisco Catalyst SD-WAN Controller and Manager Authentication Bypass Vulnerability
CISA Known Exploited Vulnerabilities CISA KEV
CISA has confirmed in-the-wild exploitation of this CVE. Federal agencies must remediate by the due date below; private orgs should treat it as priority-1.
- Vulnerability name
- Cisco Catalyst SD-WAN Controller and Manager Authentication Bypass Vulnerability
- Vendor / project
- Cisco
- Product
- Catalyst SD-WAN Controller and Manager
- Date added to KEV
- 2026-02-25
- Remediation due
- 2026-02-27
- Required action
- Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.
- Ransomware campaign use
- Unknown
- CISA notes
- CISA Mitigation Instructions: https://www.cisa.gov/news-events/directives/ed-26-03-mitigate-vulnerabilities-cisco-sd-wan-systems ; https://www.cisa.gov/news-events/directives/supplemental-direction-ed-26-03-hunt-and-hardening-guidance-cisco-sd-wan-systems ; https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk ; https://nvd.nist.gov/vuln/detail/CVE-2026-20127
- CISA listing
- www.cisa.gov/known-exploited-vulnerabilities-catalog
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-02-25 17:25:29 UTC
- NVD last modified
- 2026-02-26 16:20:02 UTC
- NVD CVSS v3.1
- 10.0 / 10 CRITICAL source: psirt@cisco.com
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 6.0 / 10
- EPSS score
- 0.4430 (probability of exploitation in next 30 days)
- EPSS percentile
- 97.61% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 04:17 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-8675 - Assigner
- cisco
- Published
- Feb 25, 2026, 4:14:20 PM
- Updated
- Feb 26, 2026, 2:44:06 PM
- EUVD base score (CVSS 3.1)
-
10.0 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - EUVD-reported EPSS
- 54.8000
- Vendors
- Cisco
- Products
-
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Catalyst SD-WAN Manager (20.12.2)
- Aliases
-
GHSA-p4cq-46q3-jr7w
ENISA description: A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, and Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system. This vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Cisco | Cisco Catalyst SD-WAN Manager |
20.1.12 (affected),
19.2.1 (affected),
18.4.4 (affected),
18.4.5 (affected),
20.1.1.1 (affected),
20.1.1 (affected),
19.3.0 (affected),
19.2.2 (affected),
19.2.099 (affected),
18.3.6 (affected),
18.3.7 (affected),
19.2.0 (affected),
18.3.8 (affected),
19.0.0 (affected),
19.1.0 (affected),
18.4.302 (affected),
18.4.303 (affected),
19.2.097 (affected),
19.2.098 (affected),
17.2.10 (affected),
18.3.6.1 (affected),
19.0.1a (affected),
18.2.0 (affected),
18.4.3 (affected),
18.4.1 (affected),
17.2.8 (affected),
18.3.3.1 (affected),
18.4.0 (affected),
18.3.1 (affected),
17.2.6 (affected),
17.2.9 (affected),
18.3.4 (affected),
17.2.5 (affected),
18.3.1.1 (affected),
18.3.5 (affected),
18.4.0.1 (affected),
18.3.3 (affected),
17.2.7 (affected),
17.2.4 (affected),
18.3.0 (affected),
19.2.3 (affected),
18.4.501_ES (affected),
20.3.1 (affected),
20.1.2 (affected),
19.2.929 (affected),
19.2.31 (affected),
20.3.2 (affected),
19.2.32 (affected),
20.3.2_925 (affected),
20.3.2.1 (affected),
20.3.2.1_927 (affected),
18.4.6 (affected),
20.1.2_937 (affected),
20.4.1 (affected),
20.3.2_928 (affected),
20.3.2_929 (affected),
20.4.1.0.1 (affected),
20.3.2.1_930 (affected),
19.2.4 (affected),
20.5.0.1.1 (affected),
20.4.1.1 (affected),
20.3.3 (affected),
19.2.4.0.1 (affected),
20.3.2_937 (affected),
20.3.3.1 (affected),
20.5.1 (affected),
20.1.3 (affected),
20.3.3.0.4 (affected),
20.3.3.1.2 (affected),
20.3.3.1.1 (affected),
20.4.1.2 (affected),
20.3.3.0.2 (affected),
20.4.1.1.5 (affected),
20.4.1.0.01 (affected),
20.4.1.0.02 (affected),
20.3.3.1.7 (affected),
20.3.3.1.5 (affected),
20.5.1.0.1 (affected),
20.3.3.1.10 (affected),
20.3.3.0.8 (affected),
20.4.2 (affected),
20.4.2.0.1 (affected),
20.3.4 (affected),
20.3.3.0.14 (affected),
19.2.4.0.8 (affected),
19.2.4.0.9 (affected),
20.3.4.0.1 (affected),
20.3.2.0.5 (affected),
20.6.1 (affected),
20.5.1.0.2 (affected),
20.3.3.0.17 (affected),
20.6.1.1 (affected),
20.6.0.18.3 (affected),
20.3.2.0.6 (affected),
20.6.0.18.4 (affected),
20.4.2.0.2 (affected),
20.3.3.0.16 (affected),
20.3.4.0.5 (affected),
20.6.1.0.1 (affected),
20.3.4.0.6 (affected),
20.6.2 (affected),
20.7.1EFT2 (affected),
20.3.4.0.9 (affected),
20.3.4.0.11 (affected),
20.4.2.0.4 (affected),
20.3.3.0.18 (affected),
20.7.1 (affected),
20.6.2.1 (affected),
20.3.4.1 (affected),
20.5.1.1 (affected),
20.4.2.1 (affected),
20.4.2.1.1 (affected),
20.3.4.1.1 (affected),
20.3.813 (affected),
20.3.4.0.19 (affected),
20.4.2.2.1 (affected),
20.5.1.2 (affected),
20.3.4.2 (affected),
20.3.814 (affected),
20.4.2.2 (affected),
20.6.2.2 (affected),
20.3.4.2.1 (affected),
20.7.1.1 (affected),
20.3.4.1.2 (affected),
20.6.2.2.2 (affected),
20.3.4.0.20 (affected),
20.6.2.2.3 (affected),
20.4.2.2.2 (affected),
20.3.5 (affected),
20.6.2.0.4 (affected),
20.4.2.2.3 (affected),
20.3.4.0.24 (affected),
20.6.2.2.7 (affected),
20.6.3 (affected),
20.3.4.2.2 (affected),
20.4.2.2.4 (affected),
20.7.1.0.2 (affected),
20.8.1 (affected),
20.3.5.0.8 (affected),
20.3.5.0.9 (affected),
20.4.2.2.8 (affected),
20.3.5.0.7 (affected),
20.6.3.0.7 (affected),
20.6.3.0.5 (affected),
20.6.3.0.10 (affected),
20.6.3.0.2 (affected),
20.7.2 (affected),
20.9.1EFT2 (affected),
20.6.3.0.11 (affected),
20.6.3.1 (affected),
20.6.3.0.14 (affected),
20.6.4 (affected),
20.9.1 (affected),
20.6.3.0.19 (affected),
20.6.3.0.18 (affected),
20.3.6 (affected),
20.9.1.1 (affected),
20.6.3.0.23 (affected),
20.6.4.0.4 (affected),
20.6.3.0.25 (affected),
20.6.5 (affected),
20.6.3.0.27 (affected),
20.9.2 (affected),
20.9.2.1 (affected),
20.6.3.0.29 (affected),
20.6.3.0.31 (affected),
20.6.3.0.32 (affected),
20.10.1 (affected),
20.6.3.0.33 (affected),
20.9.2.0.01 (affected),
20.9.1_LI_Images (affected),
20.10.1_LI_Images (affected),
20.9.2_LI_Images (affected),
20.3.7 (affected),
20.9.3 (affected),
20.6.5.1 (affected),
20.11.1 (affected),
20.11.1_LI_Images (affected),
20.9.3_LI_ Images (affected),
20.6.3.1.1 (affected),
20.9.3.0.2 (affected),
20.6.5.1.2 (affected),
20.9.3.0.3 (affected),
20.4.2.3 (affected),
20.6.3.2 (affected),
20.6.4.1 (affected),
20.6.3.0.38 (affected),
20.6.3.0.39 (affected),
20.3.5.1 (affected),
20.3.4.3 (affected),
20.9.3.1 (affected),
20.3.3.2 (affected),
20.6.5.2 (affected),
20.3.7.1 (affected),
20.10.1.1 (affected),
20.6.5.2.1 (affected),
20.3.4.0.25 (affected),
20.6.2.2.4 (affected),
20.6.1.2 (affected),
20.11.1.1 (affected),
20.9.3.0.5 (affected),
20.3.4.0.26 (affected),
20.6.5.1.3 (affected),
20.6.3.0.40 (affected),
20.1.3.1 (affected),
20.9.2.2 (affected),
20.6.5.2.3 (affected),
20.6.5.1.4 (affected),
20.6.5.3 (affected),
20.6.3.0.41 (affected),
20.9.3.0.7 (affected),
20.6.5.1.5 (affected),
20.9.3.0.4 (affected),
20.6.4.0.19 (affected),
20.6.5.1.6 (affected),
20.9.3.0.8 (affected),
20.6.3.3 (affected),
20.3.7.2 (affected),
20.6.5.4 (affected),
20.6.5.1.7 (affected),
20.9.3.0.12 (affected),
20.6.4.2 (affected),
20.6.5.5 (affected),
20.9.3.2 (affected),
20.11.1.2 (affected),
20.6.3.4 (affected),
20.10.1.2 (affected),
20.6.5.1.9 (affected),
20.9.3.0.16 (affected),
20.6.3.0.45 (affected),
20.6.5.1.10 (affected),
20.9.3.0.17 (affected),
20.6.5.2.4 (affected),
20.6.4.0.21 (affected),
20.9.3.0.18 (affected),
20.6.3.0.46 (affected),
20.6.3.0.47 (affected),
20.9.2.3 (affected),
20.9.3.2_LI_Images (affected),
20.9.3.0.21 (affected),
20.9.3.0.20 (affected),
20.9.4_LI_Images (affected),
20.9.4 (affected),
20.6.5.1.11 (affected),
20.12.1 (affected),
20.12.1_LI_Images (affected),
20.6.5.1.13 (affected),
20.9.3.0.23 (affected),
20.6.5.2.8 (affected),
20.9.4.1 (affected),
20.9.4.1_LI_Images (affected),
20.9.3.0.25 (affected),
20.9.3.0.24 (affected),
20.6.5.1.14 (affected),
20.3.8 (affected),
20.6.6 (affected),
20.9.3.0.26 (affected),
20.6.3.0.51 (affected),
20.9.3.0.29 (affected),
20.12.2 (affected),
20.12.2_LI_Images (affected),
20.6.6.0.1 (affected),
20.13.1_LI_Images (affected),
20.9.4.0.4 (affected),
20.13.1 (affected),
20.9.4.1.1 (affected),
20.9.5 (affected),
20.9.5_LI_Images (affected),
20.12.3_LI_Images (affected),
20.12.3 (affected),
20.9.4.1.3 (affected),
20.6.7 (affected),
20.9.5.1 (affected),
20.9.5.1_LI_Images (affected),
20.9.4.1.6 (affected),
20.14.1 (affected),
20.14.1_LI_Images (affected),
20.9.5.2 (affected),
20.9.5.2.1 (affected),
20.9.5.2_LI_Images (affected),
20.12.3.1 (affected),
20.12.4 (affected),
20.15.1_LI_Images (affected),
20.15.1 (affected),
20.9.5.1.4 (affected),
20.9.5.2.7 (affected),
20.9.5.2.13 (affected),
20.9.6 (affected),
20.9.6_LI_Images (affected),
20.9.5.2.14 (affected),
20.6.8 (affected),
20.12.4.0.03 (affected),
20.16.1 (affected),
20.16.1_LI_Images (affected),
20.12.4_LI_Images (affected),
20.9.5.2.16 (affected),
20.12.4.0.4 (affected),
20.12.401 (affected),
20.9.5.3 (affected),
20.9.5.3_LI_Images (affected),
20.12.4.1_LI_Images (affected),
20.12.4.1 (affected),
20.9.5.2.21 (affected),
20.9.6.0.3 (affected),
20.12.4.0.6 (affected),
20.15.2_LI_Images (affected),
20.15.2 (affected),
20.12.4_Monthly_ES5 (affected),
20.12.5 (affected),
20.12.5_LI_Images (affected),
20.9.7_LI _Images (affected),
20.9.7 (affected),
20.15.3 (affected),
20.15.3_ LI _Images (affected),
20.12.501 (affected),
20.12.5.1_LI_Images (affected),
20.12.5.1 (affected),
20.12.5.2_LI_Images (affected),
20.12.5.2 (affected),
20.15.3.1 (affected),
20.15.4_LI_Images (affected),
20.15.4 (affected),
20.9.7.1_LI _Images (affected),
20.9.7.1 (affected),
20.18.1 (affected),
20.18.1_LI_Images (affected),
20.12.6_LI_Images (affected),
20.12.6 (affected),
20.12.5.1.01 (affected),
20.9.8 (affected),
20.9.8_LI_Images (affected),
20.18.2 (affected),
20.15.4.1_LI_Images (affected),
20.15.4.1 (affected),
20.18.2_LI_Images (affected)
|
— |
Affected products — CPE 2.3 (4) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.12.6:*:*:*:*:*:*:*cpe:2.3:a:cisco:sd-wan_vsmart_controller:*:*:*:*:*:*:*:*cpe:2.3:a:cisco:sd-wan_vsmart_controller:20.12.6:*:*:*:*:*:*:*
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
Web references (5)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- http://cwe.mitre.org/data/definitions/287.html rapid7:cwe.mitre.org
- https://attackerkb.com/topics/CVE-2026-20127 rapid7:attackerkb.com
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-8675 rapid7:euvd.enisa.europa.eu
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk rapid7:sec.cloudapps.cisco.com
- https://www.cve.org/CVERecord?id=CVE-2026-20127 rapid7:www.cve.org
NVD-tagged references (2)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk psirt@cisco.com Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20127 134c704f-9b21-4f2e-91b3-4a467353bcc0 US Government Resource
Indicators (2)
IOCs linked to the auto-promoted Threat row.
| Type | Value | VirusTotal | Attached |
|---|---|---|---|
| cwe |
CWE-287
|
no local data | 2026-05-14 02:58 UTC |
| cve |
CVE-2026-20127
|
no local data | 2026-05-14 02:58 UTC |
Remediations (9)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-14 15:20 UTC -
web:cybersecuritynews.com
Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.
2026-05-14 15:20 UTC -
web:github.com
Microsoft Security Advisory CVE - 2026 -26127 - .NET Denial of Service Vulnerability Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 9.0 and .NET 10.0. This advisory also ...
2026-05-14 15:20 UTC -
web:nvd.nist.gov
Information Technology Laboratory National Vulnerability Database Vulnerabilities
2026-05-14 15:20 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-14 15:20 UTC -
web:cyberscoop.com
Threats Microsoft addresses 137 vulnerabilities in May's Patch Tuesday, including 13 rated critical The high volume of vulnerabilities reflects a growing trend researchers have been anticipating as artificial intelligence models are deployed to find previously uncovered defects in code.
2026-05-14 15:20 UTC -
web:www.secpod.com
The second Tuesday of May 2026 marked another major security update release from Microsoft, addressing a broad range of vulnerabilities across Windows, Microsoft Office, SharePoint, Dynamics 365, .NET, DNS Client, and other core enterprise components. While this month's Patch Tuesday did not include any actively exploited or publicly disclosed zero-day vulnerabilities, the release still ...
2026-05-14 15:20 UTC -
web:www.tenable.com
CVE-2026-20127 is a critical severity authentication bypass vulnerability in Cisco's Catalyst SD-WAN Controller and Cisco Catalyst SD-WAN Manager. A remote, unauthenticated attacker could exploit this vulnerability by sending crafted requests to an affected system, allowing them to log into an affected device as a high-privileged user.
2026-05-14 15:20 UTC -
CISA KEV
Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available. Due date: 2026-02-27 Known ransomware campaign use: Unknown
2026-05-14 01:13 UTC
AI Forensic Analysis
Only Available for Registered Users. Sign in to view.
Raw JSON
The full cvelistV5 record. Download as CVE-2026-20127.json.
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-20127",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-02-26T04:55:54.782171Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2026-02-25",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20127"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-02-26T14:44:06.050Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20127"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Cisco Catalyst SD-WAN Manager",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "20.1.12"
},
{
"status": "affected",
"version": "19.2.1"
},
{
"status": "affected",
"version": "18.4.4"
},
{
"status": "affected",
"version": "18.4.5"
},
{
"status": "affected",
"version": "20.1.1.1"
},
{
"status": "affected",
"version": "20.1.1"
},
{
"status": "affected",
"version": "19.3.0"
},
{
"status": "affected",
"version": "19.2.2"
},
{
"status": "affected",
"version": "19.2.099"
},
{
"status": "affected",
"version": "18.3.6"
},
{
"status": "affected",
"version": "18.3.7"
},
{
"status": "affected",
"version": "19.2.0"
},
{
"status": "affected",
"version": "18.3.8"
},
{
"status": "affected",
"version": "19.0.0"
},
{
"status": "affected",
"version": "19.1.0"
},
{
"status": "affected",
"version": "18.4.302"
},
{
"status": "affected",
"version": "18.4.303"
},
{
"status": "affected",
"version": "19.2.097"
},
{
"status": "affected",
"version": "19.2.098"
},
{
"status": "affected",
"version": "17.2.10"
},
{
"status": "affected",
"version": "18.3.6.1"
},
{
"status": "affected",
"version": "19.0.1a"
},
{
"status": "affected",
"version": "18.2.0"
},
{
"status": "affected",
"version": "18.4.3"
},
{
"status": "affected",
"version": "18.4.1"
},
{
"status": "affected",
"version": "17.2.8"
},
{
"status": "affected",
"version": "18.3.3.1"
},
{
"status": "affected",
"version": "18.4.0"
},
{
"status": "affected",
"version": "18.3.1"
},
{
"status": "affected",
"version": "17.2.6"
},
{
"status": "affected",
"version": "17.2.9"
},
{
"status": "affected",
"version": "18.3.4"
},
{
"status": "affected",
"version": "17.2.5"
},
{
"status": "affected",
"version": "18.3.1.1"
},
{
"status": "affected",
"version": "18.3.5"
},
{
"status": "affected",
"version": "18.4.0.1"
},
{
"status": "affected",
"version": "18.3.3"
},
{
"status": "affected",
"version": "17.2.7"
},
{
"status": "affected",
"version": "17.2.4"
},
{
"status": "affected",
"version": "18.3.0"
},
{
"status": "affected",
"version": "19.2.3"
},
{
"status": "affected",
"version": "18.4.501_ES"
},
{
"status": "affected",
"version": "20.3.1"
},
{
"status": "affected",
"version": "20.1.2"
},
{
"status": "affected",
"version": "19.2.929"
},
{
"status": "affected",
"version": "19.2.31"
},
{
"status": "affected",
"version": "20.3.2"
},
{
"status": "affected",
"version": "19.2.32"
},
{
"status": "affected",
"version": "20.3.2_925"
},
{
"status": "affected",
"version": "20.3.2.1"
},
{
"status": "affected",
"version": "20.3.2.1_927"
},
{
"status": "affected",
"version": "18.4.6"
},
{
"status": "affected",
"version": "20.1.2_937"
},
{
"status": "affected",
"version": "20.4.1"
},
{
"status": "affected",
"version": "20.3.2_928"
},
{
"status": "affected",
"version": "20.3.2_929"
},
{
"status": "affected",
"version": "20.4.1.0.1"
},
{
"status": "affected",
"version": "20.3.2.1_930"
},
{
"status": "affected",
"version": "19.2.4"
},
{
"status": "affected",
"version": "20.5.0.1.1"
},
{
"status": "affected",
"version": "20.4.1.1"
},
{
"status": "affected",
"version": "20.3.3"
},
{
"status": "affected",
"version": "19.2.4.0.1"
},
{
"status": "affected",
"version": "20.3.2_937"
},
{
"status": "affected",
"version": "20.3.3.1"
},
{
"status": "affected",
"version": "20.5.1"
},
{
"status": "affected",
"version": "20.1.3"
},
{
"status": "affected",
"version": "20.3.3.0.4"
},
{
"status": "affected",
"version": "20.3.3.1.2"
},
{
"status": "affected",
"version": "20.3.3.1.1"
},
{
"status": "affected",
"version": "20.4.1.2"
},
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],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, and Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system.\r\n\r\nThis vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric. "
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco PSIRT is aware of limited exploitation of this vulnerability. Cisco continues to strongly recommend that customers upgrade to a fixed software release to remediate this vulnerability."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 10,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-287",
"description": "Improper Authentication",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-02-25T16:18:10.274Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-sdwan-rpa-EHchtZk",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk"
}
],
"source": {
"advisory": "cisco-sa-sdwan-rpa-EHchtZk",
"defects": [
"CSCws52722"
],
"discovery": "INTERNAL"
},
"title": "Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-20127",
"datePublished": "2026-02-25T16:14:20.137Z",
"dateReserved": "2025-10-08T11:59:15.379Z",
"dateUpdated": "2026-02-26T14:44:06.050Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}