CVE-2026-69794: CWE-126: Buffer Over-read in Microsoft Windows 10 Version 1607
Description
CVE-2026-69794 is a buffer over-read vulnerability in the Windows Encrypting File System (EFS) affecting multiple versions of Microsoft Windows 10, including Version 1607. This flaw allows an authorized local attacker to disclose information. The vulnerability has a medium severity rating with a CVSS score of 5.5. An official fix is available from Microsoft.
CVSS v3.1
Score 5.5medium
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 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 involves a buffer over-read in the Windows Encrypting File System (EFS) component of Microsoft Windows 10. An authorized attacker with local access can exploit this flaw to read information beyond the intended buffer boundaries, potentially disclosing sensitive data. The issue affects several Windows 10 versions starting from build 14393.0 up to various fixed builds. Microsoft has published an official fix addressing this vulnerability.
Potential Impact
An authorized local attacker can exploit this buffer over-read vulnerability to disclose sensitive information from memory. There is no impact on integrity or availability. The vulnerability does not require user interaction and has low attack complexity.
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 at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69794.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T22:47:19.709Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69794","vendor":"Microsoft"}]
Threat ID: 6aa0452bacd9273b49fa9967
Added to database: 09/08/2026, 17:26:03 UTC
Last enriched: 10/16/2026, 21:34:14 UTC
Last updated: 10/21/2026, 13:40:31 UTC
Views: 30
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