CVE-2026-69829: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
CVE-2026-69829 is a critical heap-based buffer overflow vulnerability in the Windows Shell component affecting multiple Windows 10 versions including Version 1607. This flaw allows an unauthorized attacker to execute code remotely over a network without user interaction or privileges. The vulnerability has a CVSS score of 9.8, indicating severe impact on confidentiality, integrity, and availability. Microsoft has issued an official fix to address this issue.
CVSS v3.1
Score 9.8critical
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-2026-69829) is a heap-based buffer overflow in the Windows Shell that enables remote code execution by an unauthenticated attacker over a network. It affects multiple builds of Windows 10, including Version 1607 and later updates, as specified by the affected version ranges. The flaw allows complete compromise of the affected system if exploited. Microsoft has published an official security update to remediate this vulnerability.
Potential Impact
Successful exploitation of this vulnerability allows an attacker to execute arbitrary code remotely without requiring user interaction or privileges, leading to full system compromise. The impact includes complete loss of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69829 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T22:50:31.852Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69829","vendor":"Microsoft"}]
Threat ID: 6aa04531acd9273b49fa9a25
Added to database: 09/08/2026, 17:26:09 UTC
Last enriched: 10/16/2026, 21:36:08 UTC
Last updated: 10/24/2026, 03:05:10 UTC
Views: 56
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