CVE-2026-0228
📛 CVE Title
PAN-OS: Improper Validation of Terminal Server Agent Certificate
Description
An improper certificate validation vulnerability in PAN-OS allows users to connect Terminal Server Agents on Windows to PAN-OS using expired certificates even if the PAN-OS configuration would not normally permit them to do so.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- palo_alto
- CVSS severity
- LOW
- CVSS score
- 1.3 / 10
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Amber- Effective score
- 1.3 / 10 LOW source: CNA overview
- CWE(s)
-
CWE-295 - Reserved
- 2025-11-03
- Published
- 2026-02-11 17:55 UTC
- Last updated
- 2026-02-11 19:04 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/0xxx/CVE-2026-0228.json
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
- 2026-02-11 18:16:07 UTC
- NVD last modified
- 2026-04-15 00:35:42 UTC
- EPSS score
- 0.0001 (probability of exploitation in next 30 days)
- EPSS percentile
- 2.11% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 04:50 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-2026-5939 - Assigner
- palo_alto
- Published
- Feb 11, 2026, 5:55:44 PM
- Updated
- Feb 11, 2026, 7:04:15 PM
- EUVD base score (CVSS 4.0)
-
1.3 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Amber - EUVD-reported EPSS
- 0.0100
- Vendors
- Palo Alto Networks
- Products
-
PAN-OS (11.2.0 <11.2.8)PAN-OS (11.2.0 <11.2.8)PAN-OS (11.1.0 <11.1.11)PAN-OS (10.2.0 <10.2.17)Prisma Access (10.2.0 <10.2.10-h28)PAN-OS (10.2.0 <10.2.17)PAN-OS (11.1.0 <11.1.11)Prisma Access (10.2.0 <10.2.10-h28)
- Aliases
-
GHSA-j8fr-767f-7h52
ENISA description: An improper certificate validation vulnerability in PAN-OS allows users to connect Terminal Server Agents on Windows to PAN-OS using expired certificates even if the PAN-OS configuration would not normally permit them to do so.
EUVD references (1)
Affected products (3)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Palo Alto Networks | Cloud NGFW |
All (unaffected)
|
— |
| Palo Alto Networks | PAN-OS |
12.1.0 (unaffected),
11.2.0 (affected),
11.1.0 (affected),
10.2.0 (affected)
|
— |
| Palo Alto Networks | Prisma Access |
10.2.0 (affected)
|
PAN-OS |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
- https://security.paloaltonetworks.com/CVE-2026-0228 vendor-advisory
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/295.html rapid7:cwe.mitre.org
- https://attackerkb.com/topics/CVE-2026-0228 rapid7:attackerkb.com
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-5939 rapid7:euvd.enisa.europa.eu
- https://security.paloaltonetworks.com/CVE-2026-0228 rapid7:security.paloaltonetworks.com
- https://www.cve.org/CVERecord?id=CVE-2026-0228 rapid7:www.cve.org
NVD-tagged references (1)
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://security.paloaltonetworks.com/CVE-2026-0228 psirt@paloaltonetworks.com
Remediations (10)
-
web:blog.qualys.com
Microsoft has rolled out its March 2026 Patch Tuesday updates, delivering a fresh batch of security fixes designed to keep Windows environments protected from emerging threats.
2026-05-23 21:34 UTC -
web:cyberpress.org
Microsoft has released its April 2026 Patch Tuesday updates, fixing 168 vulnerabilities across Windows, cloud, and application products, including one actively exploited zero-day in Microsoft SharePoint Server.
2026-05-23 21:34 UTC -
web:cybersecuritynews.com
Microsoft released its March 2026 Patch Tuesday security update on March 10, 2026 , addressing 78 vulnerabilities across Windows, Microsoft Office, Azure, SQL Server, and .NET. The update includes one actively exploited zero-day vulnerability and multiple Critical-rated flaws demanding immediate attention from security teams. The most urgent fix this month is CVE - 2026 -21262, the sole zero-day ...
2026-05-23 21:34 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.
2026-05-23 21:34 UTC -
web:www.akamai.com
Akamai researchers reveal how an incomplete patch for APT28's zero-day led to CVE - 2026 -32202, a zero-click vulnerability enabling NTLM authentication coercion.
2026-05-23 21:34 UTC -
web:www.bleepingcomputer.com
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has ordered federal agencies to secure their Windows systems against a vulnerability exploited in zero-day attacks.
2026-05-23 21:34 UTC -
web:www.cisecurity.org
<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...
2026-05-23 21:34 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-23 21:34 UTC -
web:www.pcworld.com
This month's Patch Tuesday brings over 80 fixes for various security vulnerabilities. Fortunately, none are actively being exploited in the wild yet.
2026-05-23 21:34 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-23 21:34 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-0228.json.
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"value": "<table><thead><tr><th>Version<br></th><th>Minor Version<br></th><th>Suggested Solution<br></th></tr></thead><tbody><tr><td>Cloud NGFW<br></td><td></td><td>No action needed.</td></tr><tr><td>PAN-OS 12.1<br></td><td></td><td>No action needed.</td></tr><tr>\n <td>PAN-OS 11.2<br></td>\n <td>11.2.0 through 11.2.7</td>\n <td>Upgrade to 11.2.8 or later.</td>\n </tr><tr>\n <td>PAN-OS 11.1<br></td>\n <td>11.1.0 through 11.1.10</td>\n <td>Upgrade to 11.1.11 or later.</td>\n </tr><tr>\n <td>PAN-OS 10.2<br></td>\n <td>10.2.0 through 10.2.16</td>\n <td>Upgrade to 10.2.17 or later.</td>\n </tr><tr><td>All older<br>unsupported<br>PAN-OS versions</td><td> </td><td>Upgrade to a supported fixed version.</td></tr><tr>\n <td>Prisma Access 11.2 on PAN-OS<br></td>\n <td>11.2.0 through 11.2.7</td>\n <td>Upgrade to 11.2.7-h10 or later.</td>\n </tr><tr>\n <td>Prisma Access 10.2 on PAN-OS</td>\n <td>10.2.0 through 10.2.10</td>\n <td>Upgrade to 10.2.10-h28 or later.</td>\n </tr></tbody></table>"
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"value": "VERSION MINOR VERSION SUGGESTED SOLUTION\nCloud NGFW No action needed.\nPAN-OS 12.1 No action needed.\nPAN-OS 11.2 11.2.0 through 11.2.7 Upgrade to 11.2.8 or later.\nPAN-OS 11.1 11.1.0 through 11.1.10 Upgrade to 11.1.11 or later.\nPAN-OS 10.2 10.2.0 through 10.2.16 Upgrade to 10.2.17 or later.\nAll older \u00a0 Upgrade to a supported fixed version.\nunsupported\nPAN-OS versions\nPrisma Access 11.2 on PAN-OS 11.2.0 through 11.2.7 Upgrade to 11.2.7-h10 or later.\nPrisma Access 10.2 on PAN-OS 10.2.0 through 10.2.10 Upgrade to 10.2.10-h28 or later."
}
],
"source": {
"discovery": "EXTERNAL"
},
"timeline": [
{
"lang": "en",
"time": "2026-02-11T17:00:00.000Z",
"value": "Initial Publication"
}
],
"title": "PAN-OS: Improper Validation of Terminal Server Agent Certificate",
"workarounds": [
{
"lang": "eng",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "No known workarounds exist for this issue."
}
],
"value": "No known workarounds exist for this issue."
}
],
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"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "d6c1279f-00f6-4ef7-9217-f89ffe703ec0",
"assignerShortName": "palo_alto",
"cveId": "CVE-2026-0228",
"datePublished": "2026-02-11T17:55:44.109Z",
"dateReserved": "2025-11-03T20:43:49.514Z",
"dateUpdated": "2026-02-11T19:04:15.415Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}