CVE-2026-65797: CWE-197: Numeric Truncation Error in Microsoft Windows 10 Version 1607
Numeric truncation error in Windows DNS allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a numeric truncation error in the Windows DNS implementation on Windows 10 Version 1607 (build 10.0.14393.0). Exploitation requires local access with existing privileges and can result in privilege escalation. The vulnerability is tracked as CWE-197 and has been assigned CVE-2026-65797. Microsoft has published an official fix to remediate this issue.
Potential Impact
An authorized local attacker can exploit this numeric truncation error to elevate their privileges, potentially gaining higher-level access on the affected system. The vulnerability impacts confidentiality, integrity, and availability as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65797 to remediate the issue.
CVE-2026-65797: CWE-197: Numeric Truncation Error in Microsoft Windows 10 Version 1607
Description
Numeric truncation error in Windows DNS allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 6.7medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a numeric truncation error in the Windows DNS implementation on Windows 10 Version 1607 (build 10.0.14393.0). Exploitation requires local access with existing privileges and can result in privilege escalation. The vulnerability is tracked as CWE-197 and has been assigned CVE-2026-65797. Microsoft has published an official fix to remediate this issue.
Potential Impact
An authorized local attacker can exploit this numeric truncation error to elevate their privileges, potentially gaining higher-level access on the affected system. The vulnerability impacts confidentiality, integrity, and availability as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65797 to remediate the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-22T21:36:47.629Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65797","vendor":"Microsoft"}]
Threat ID: 6a7b5833bf8831d5391564c1
Added to database: 08/11/2026, 17:13:23 UTC
Last enriched: 08/11/2026, 19:44:22 UTC
Last updated: 08/12/2026, 00:12:10 UTC
Views: 5
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