CVE-2026-69343: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 1607
Description
CVE-2026-69343 is an out-of-bounds read vulnerability in the Windows Overlay Filter component of Microsoft Windows 10 Version 1607 and related builds. It 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 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, identified as CWE-125 (Out-of-bounds Read), exists in the Windows Overlay Filter component of Microsoft Windows 10 Version 1607 and several other related versions. It allows an authorized attacker with local access to read memory outside the intended bounds, potentially disclosing sensitive information. The CVSS 3.1 base score is 5.5, reflecting a medium severity with local attack vector, low attack complexity, and requiring privileges but no user interaction. Microsoft has published an official fix addressing this issue.
Potential Impact
An authorized local attacker can exploit this vulnerability to read memory beyond the intended buffer limits, leading to potential disclosure of sensitive information. There is no impact on integrity or availability. The vulnerability does not require user interaction but does require local privileges.
Mitigation Recommendations
An official fix from Microsoft is available and should be applied to affected systems. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69343 for update details and installation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T20:52:08.511Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69343","vendor":"Microsoft"}]
Threat ID: 6aa044e7acd9273b49fa7e7d
Added to database: 09/08/2026, 17:24:55 UTC
Last enriched: 10/16/2026, 21:04:51 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 34
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