CVE-2026-34343: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Heap-based buffer overflow in Windows Application Identity (AppID) Subsystem allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a heap-based buffer overflow in the AppID subsystem of Windows 10 Version 1607, which can be exploited by an authorized local attacker to gain elevated privileges. The vulnerability is tracked as CVE-2026-34343 and is classified under CWE-122. Microsoft has published an official fix to remediate this issue. No known exploits in the wild have been reported at this time.
Potential Impact
Successful exploitation of this vulnerability allows an authorized local attacker to elevate their privileges, potentially gaining higher-level access to the system. This could lead to full system compromise depending on the privileges obtained. The vulnerability affects confidentiality, integrity, and availability as indicated by the CVSS vector.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as soon as possible to mitigate the risk. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34343 for detailed patch information and installation instructions.
CVE-2026-34343: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
Heap-based buffer overflow in Windows Application Identity (AppID) Subsystem allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a heap-based buffer overflow in the AppID subsystem of Windows 10 Version 1607, which can be exploited by an authorized local attacker to gain elevated privileges. The vulnerability is tracked as CVE-2026-34343 and is classified under CWE-122. Microsoft has published an official fix to remediate this issue. No known exploits in the wild have been reported at this time.
Potential Impact
Successful exploitation of this vulnerability allows an authorized local attacker to elevate their privileges, potentially gaining higher-level access to the system. This could lead to full system compromise depending on the privileges obtained. The vulnerability affects confidentiality, integrity, and availability as indicated by the CVSS vector.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the security update provided by Microsoft for Windows 10 Version 1607 (build 10.0.14393.0) as soon as possible to mitigate the risk. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34343 for detailed patch information and installation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-03-26T21:02:16.446Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34343","vendor":"Microsoft"}]
Threat ID: 6a036540cbff5d861008c48a
Added to database: 05/12/2026, 17:37:04 UTC
Last enriched: 06/19/2026, 17:33:03 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 60
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