CVE-2026-69689: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 1809
Description
CVE-2026-69689 is a high-severity out-of-bounds read vulnerability in the Windows Win32K component affecting Windows 10 Version 1809 and later builds. It allows an authorized attacker to elevate privileges over a network. The vulnerability has an official fix available from Microsoft.
CVSS v3.1
Score 8.0high
Affected software
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 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 an out-of-bounds read in the Windows Win32K subsystem, which can be exploited by an authorized attacker to elevate privileges remotely over a network. The affected versions include multiple Windows 10 builds starting from 10.0.17763.0 up to but excluding specific patched builds. The CVSS v3.1 score is 8.0, indicating high severity with network attack vector, low attack complexity, required privileges, and user interaction. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation can lead to elevation of privileges, allowing an attacker with authorized network access to gain higher-level permissions on the affected system. This can compromise confidentiality, integrity, and availability of the system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69689 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T21:28:58.728Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69689","vendor":"Microsoft"}]
Threat ID: 6aa04520acd9273b49fa981b
Added to database: 09/08/2026, 17:25:52 UTC
Last enriched: 10/16/2026, 21:28:26 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 25
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