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 Windows Application Identity (AppID) Subsystem on Windows 10 Version 1607 (build 10.0.14393.0). An attacker with local access and some level of authorization can exploit this flaw to escalate privileges, potentially gaining higher system rights. The vulnerability is tracked as CWE-122 and has been assigned CVE-2026-34343. Microsoft has published an official fix to remediate this issue. No public exploit activity has been reported so far.
Potential Impact
Successful exploitation of this vulnerability could allow an authorized local attacker to elevate their privileges, potentially leading to full system compromise or unauthorized actions requiring higher privileges. The impact includes confidentiality, integrity, and availability being rated as high according to the CVSS vector.
Mitigation Recommendations
An official fix is available from Microsoft and should be applied promptly to affected systems running Windows 10 Version 1607. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34343 for detailed patching instructions and updates. No additional mitigation steps are indicated beyond applying the official patch.
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a heap-based buffer overflow in the Windows Application Identity (AppID) Subsystem on Windows 10 Version 1607 (build 10.0.14393.0). An attacker with local access and some level of authorization can exploit this flaw to escalate privileges, potentially gaining higher system rights. The vulnerability is tracked as CWE-122 and has been assigned CVE-2026-34343. Microsoft has published an official fix to remediate this issue. No public exploit activity has been reported so far.
Potential Impact
Successful exploitation of this vulnerability could allow an authorized local attacker to elevate their privileges, potentially leading to full system compromise or unauthorized actions requiring higher privileges. The impact includes confidentiality, integrity, and availability being rated as high according to the CVSS vector.
Mitigation Recommendations
An official fix is available from Microsoft and should be applied promptly to affected systems running Windows 10 Version 1607. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34343 for detailed patching instructions and updates. No additional mitigation steps are indicated beyond applying the official patch.
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: 5/12/2026, 5:37:04 PM
Last enriched: 5/12/2026, 7:22:35 PM
Last updated: 5/13/2026, 4:26:23 AM
Views: 2
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