CVE-2026-69685: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
CVE-2026-69685 is a heap-based buffer overflow vulnerability in the Windows Kerberos component affecting multiple versions of Microsoft Windows 10, including Version 1607. This flaw allows an authorized local attacker to elevate privileges. The vulnerability has a high severity rating with a CVSS score of 7.8. Microsoft has released official fixes to address this issue.
CVSS v3.1
Score 7.8high
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2012
Microsoft
Windows Server 2012 (Server Core installation)
Microsoft
Windows Server 2012 R2
Microsoft
Windows Server 2012 R2 (Server Core installation)
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-69685) involves a heap-based buffer overflow in the Windows Kerberos implementation. An authorized attacker with local access can exploit this to elevate privileges on affected Windows 10 versions. The flaw impacts several builds of Windows 10, including but not limited to versions starting from 10.0.14393.0 up to but excluding 10.0.14393.9512, and similar version ranges for other Windows 10 builds. The vulnerability is classified under CWE-122. Microsoft has published an official fix to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability allows an authorized local attacker to elevate their privileges, potentially gaining higher-level access than intended. The impact includes confidentiality, integrity, and availability being rated high according to the CVSS vector, indicating significant risk if exploited.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft for the affected Windows 10 versions as detailed in the Microsoft Security Response Center advisory. No additional mitigation steps are indicated beyond applying the official patches.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T21:28:58.727Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69685","vendor":"Microsoft"}]
Threat ID: 6aa0451dacd9273b49fa97dc
Added to database: 09/08/2026, 17:25:49 UTC
Last enriched: 10/16/2026, 21:28:03 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 24
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