CVE-2026-42000
📛 CVE Title
Insufficient Validation of Names During AXFR
Description
Insufficient Validation of Names During AXFR
Overview
- State
- PUBLISHED
- Assigner (CNA)
- OX
- CVSS severity
- MEDIUM
- CVSS score
- 6.8 / 10
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N- Effective score
- 6.8 / 10 MEDIUM source: CNA overview
- CWE(s)
- —
- Reserved
- 2026-04-23
- Published
- 2026-05-21 09:25 UTC
- Last updated
- 2026-05-21 09:25 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/42xxx/CVE-2026-42000.json
- Linked Threat
- CVE-2026-42000 — CVE-2026-42000
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
- 2026-05-21 10:16:25 UTC
- NVD last modified
- 2026-05-21 15:27:51 UTC
- NVD CVSS v3.1
- 6.8 / 10 MEDIUM source: security@open-xchange.com
- NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N- Exploitability subscore
- 2.2 / 10
- Impact subscore
- 4.0 / 10
- EPSS score
- 0.0000 (probability of exploitation in next 30 days)
- EPSS percentile
- 0.13% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD-assigned CWE(s):
CWE-77
(differs from the CNA list above)
NVD / KEV / EPSS data refreshed 2026-05-25 00:30 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-2026-31261 - Assigner
- OX
- Published
- May 21, 2026, 9:25:43 AM
- Updated
- May 21, 2026, 12:02:35 PM
- EUVD base score (CVSS 3.1)
-
6.8 / 10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N - EUVD-reported EPSS
- 0.0200
- Vendors
- PowerDNS
- Products
-
Authoritative (5.0.0 <5.0.5)Authoritative (4.9.0 <4.9.15)
- Aliases
-
GHSA-cmjg-f724-5qh3
ENISA description: Insufficient Validation of Names During AXFR
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| PowerDNS | Authoritative |
4.9.0 (affected),
5.0.0 (affected)
|
— |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
Web references (4)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-06.html tenable:docs.powerdns.com
- https://nvd.nist.gov/vuln/detail/CVE-2026-42000 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-42000 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.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://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-06.html security@open-xchange.com
Remediations (15)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:blog.qualys.com
With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.
2026-05-23 22:19 UTC -
web:krebsonsecurity.com
For a clickable, per- patch breakdown, check out the SANS Internet Storm Center Patch Tuesday roundup. Running into problems applying any of these updates?
2026-05-23 22:19 UTC -
web:oradba.ch
19c 26ai cve oracle-cpu patch -management release-update security Oracle CPU April 2026 : Delayed RUs & First Analysis On April 21, 2026 , Oracle released the Critical Patch Update (CPU) for April 2026 — 481 new security fixes across the entire Oracle product stack. For Oracle Database, this means another round of mandatory patching.
2026-05-23 22:19 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 22:19 UTC -
web:www.crowdstrike.com
Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.
2026-05-23 22:19 UTC -
web:www.notebookcheck.net
Microsoft April 2026 Patch Tuesday fixes 167 vulnerabilities, including an actively exploited SharePoint zero-day. Windows 11 KB5083769 and KB5082052 bring new builds and RDP security.
2026-05-23 22:19 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 22:19 UTC -
web:www.techrepublic.com
Microsoft's April 2026 Patch Tuesday fixes 165 vulnerabilities, including two zero-days, in one of the company's largest monthly security updates.
2026-05-23 22:19 UTC -
web:www.thehackerwire.com
How do I fix or mitigate CVE-2026-42000 ? To protect against CVE-2026-42000 , you should: (1) Apply the latest security patches from the vendor, (2) Check official security advisories for specific remediation steps, (3) Update affected software to the latest version, and (4) Monitor your systems for any signs of exploitation.
2026-05-23 22:19 UTC -
web:www.windowslatest.com
Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.
2026-05-23 22:19 UTC -
web:blogs.oracle.com
For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.
2026-06-03 22:32 UTC -
web:cybersecuritynews.com
Microsoft has released its April 2026 Patch Tuesday security update, addressing 168 vulnerabilities across its product portfolio including one actively exploited zero-day and one publicly disclosed flaw that organizations must prioritize immediately.
2026-06-03 22:32 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.
2026-06-03 22:32 UTC -
web:support.servicenow.com
Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...
2026-06-03 22:32 UTC -
web:www.microsoft.com
Security Update Guide Notifications Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed.
2026-06-03 22:32 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-42000.json.
{
"containers": {
"cna": {
"affected": [
{
"collectionURL": "https://repo.powerdns.com/",
"defaultStatus": "unaffected",
"modules": [
"BIND Backend"
],
"packageName": "pdns",
"product": "Authoritative",
"programFiles": [
"bindbackend2.cc"
],
"repo": "https://github.com/PowerDNS/pdns",
"vendor": "PowerDNS",
"versions": [
{
"lessThan": "4.9.15",
"status": "affected",
"version": "4.9.0",
"versionType": "semver"
},
{
"lessThan": "5.0.5",
"status": "affected",
"version": "5.0.0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "ilhamaf"
}
],
"datePublic": "2026-05-19T22:00:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "<p>Insufficient Validation of Names During AXFR</p>"
}
],
"value": "Insufficient Validation of Names During AXFR"
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N",
"version": "3.1"
},
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"scenarios": [
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"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "Improper Neutralization of Special Elements used in a Command ('Command Injection')",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-21T09:25:43.728Z",
"orgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981",
"shortName": "OX"
},
"references": [
{
"url": "https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-06.html"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Insufficient Validation of Names During AXFR",
"x_generator": {
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},
"cveMetadata": {
"assignerOrgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981",
"assignerShortName": "OX",
"cveId": "CVE-2026-42000",
"datePublished": "2026-05-21T09:25:43.728Z",
"dateReserved": "2026-04-23T11:15:21.198Z",
"dateUpdated": "2026-05-21T09:25:43.728Z",
"state": "PUBLISHED"
},
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