CVE-2026-42001: Autoprimary SOA Queries Vulnerability
The National Vulnerability Database has issued an advisory for CVE-2026-42001, highlighting an ‘Insufficient Validation of Autoprimary SOA Queries’ vulnerability. This flaw carries a CVSS score of 7.5 (HIGH), indicating a significant risk.
The vulnerability’s CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H points to a network-exploitable flaw requiring no privileges or user interaction. Its impact is high on availability, with no direct impact on confidentiality or integrity. This means an attacker could potentially disrupt DNS services by exploiting this validation weakness, leading to denial-of-service conditions.
While specific affected products are not detailed by the National Vulnerability Database, organizations running DNS infrastructure should immediately assess their configurations and software versions for any components handling autoprimary SOA queries. This type of vulnerability often impacts widely used DNS server software, making broad vigilance essential. Patching or implementing robust input validation measures will be critical to mitigate this risk.
What This Means For You
- If your organization relies on DNS services, you need to understand the implications of CVE-2026-42001. This vulnerability could allow unauthenticated attackers to disrupt your DNS, crippling critical services. Prioritize auditing your DNS server configurations and applying any available patches for components that handle autoprimary SOA queries.
Related ATT&CK Techniques
🛡️ Detection Rules
4 rules · 6 SIEM formats4 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
Web Application Exploitation Attempt — CVE-2026-42001
title: Web Application Exploitation Attempt — CVE-2026-42001
id: scw-2026-05-21-1
status: experimental
level: high
description: |
Detects common exploitation patterns targeting web applications. Review CVE-2026-42001 advisories for specific indicators.
author: SCW Feed Engine (auto-generated)
date: 2026-05-21
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-42001/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri-query|contains:
- '..'
- 'SELECT'
- 'UNION'
- '<script'
- 'cmd='
- '/etc/passwd'
condition: selection
falsepositives:
- Legitimate activity from CVE-2026-42001
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-42001 | Misconfiguration | Insufficient Validation of Autoprimary SOA Queries |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 21, 2026 at 13:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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