CVE-2026-69729: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 11 Version 24H2
Description
CVE-2026-69729 is a heap-based buffer overflow vulnerability in Windows Credential Providers affecting Windows 11 Version 24H2. It allows an authorized attacker with network access to execute arbitrary code. The vulnerability has a high severity with a CVSS score of 8.8. An official fix is available from Microsoft.
CVSS v3.1
Score 8.8high
Affected software
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a heap-based buffer overflow in the Windows Credential Providers component of Windows 11 Version 24H2. It enables an attacker with authorized network access to execute arbitrary code on the affected system. The flaw is tracked as CWE-122 and has a CVSS 3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability. Multiple affected version ranges are identified, all prior to specific build numbers. Microsoft has released an official fix for this issue.
Potential Impact
Successful exploitation allows an authorized attacker to execute arbitrary code remotely over a network, potentially leading to full system compromise including confidentiality, integrity, and availability impacts.
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-2026-69729 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T21:35:55.264Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69729","vendor":"Microsoft"}]
Threat ID: 6aa04523acd9273b49fa9897
Added to database: 09/08/2026, 17:25:55 UTC
Last enriched: 10/16/2026, 21:30:38 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 31
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