CVE-2026-49174: CWE-306: Missing Authentication for Critical Function in Microsoft Windows 10 Version 1809
CVE-2026-49174 is a vulnerability in Microsoft Windows 10 Version 1809 where a critical DNS function lacks proper authentication. This flaw allows an authorized local attacker with limited privileges to tamper with DNS functionality. The vulnerability has a medium severity rating and a CVSS score of 6.1. An official fix is available from Microsoft to address this issue.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-306 (Missing Authentication for Critical Function), affects the DNS component of Microsoft Windows 10 Version 1809 (build 10.0.17763.0). It allows an attacker with local access and limited privileges to perform tampering actions due to missing authentication controls on a critical DNS function. The CVSS v3.1 base score is 6.1, reflecting local attack vector, low attack complexity, required privileges, no user interaction, unchanged scope, low confidentiality impact, high integrity impact, and no availability impact. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
An authorized local attacker with limited privileges can tamper with the DNS functionality on affected Windows 10 Version 1809 systems. This could lead to integrity violations in DNS operations, potentially redirecting or manipulating DNS queries or responses. Confidentiality impact is low, and availability is not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49174 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor.
CVE-2026-49174: CWE-306: Missing Authentication for Critical Function in Microsoft Windows 10 Version 1809
Description
CVE-2026-49174 is a vulnerability in Microsoft Windows 10 Version 1809 where a critical DNS function lacks proper authentication. This flaw allows an authorized local attacker with limited privileges to tamper with DNS functionality. The vulnerability has a medium severity rating and a CVSS score of 6.1. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 6.1medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-306 (Missing Authentication for Critical Function), affects the DNS component of Microsoft Windows 10 Version 1809 (build 10.0.17763.0). It allows an attacker with local access and limited privileges to perform tampering actions due to missing authentication controls on a critical DNS function. The CVSS v3.1 base score is 6.1, reflecting local attack vector, low attack complexity, required privileges, no user interaction, unchanged scope, low confidentiality impact, high integrity impact, and no availability impact. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
An authorized local attacker with limited privileges can tamper with the DNS functionality on affected Windows 10 Version 1809 systems. This could lead to integrity violations in DNS operations, potentially redirecting or manipulating DNS queries or responses. Confidentiality impact is low, and availability is not affected. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49174 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-27T23:44:09.623Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49174","vendor":"Microsoft"}]
Threat ID: 6a566f6b68715ace43e6b3d8
Added to database: 07/14/2026, 17:18:35 UTC
Last enriched: 07/15/2026, 01:48:59 UTC
Last updated: 07/15/2026, 01:48:59 UTC
Views: 3
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