CVE-2026-34336: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Integer overflow or wraparound in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves an integer overflow or wraparound in the Windows Desktop Window Manager (DWM) Core Library in Windows 10 Version 1607 (build 10.0.14393.0). The flaw leads to a heap-based buffer overflow that can be exploited by an authorized local attacker to gain elevated privileges. The CVSS v3.1 base score is 7.8, indicating high severity. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher system rights. The vulnerability affects confidentiality, integrity, and availability with high impact as per the CVSS vector. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official patch is available from Microsoft and should be applied to affected systems running Windows 10 Version 1607 (build 10.0.14393.0). Administrators should follow the guidance in the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34336 to remediate this vulnerability.
CVE-2026-34336: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607
Description
Integer overflow or wraparound in Windows DWM Core Library 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 an integer overflow or wraparound in the Windows Desktop Window Manager (DWM) Core Library in Windows 10 Version 1607 (build 10.0.14393.0). The flaw leads to a heap-based buffer overflow that can be exploited by an authorized local attacker to gain elevated privileges. The CVSS v3.1 base score is 7.8, indicating high severity. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, potentially gaining higher system rights. The vulnerability affects confidentiality, integrity, and availability with high impact as per the CVSS vector. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official patch is available from Microsoft and should be applied to affected systems running Windows 10 Version 1607 (build 10.0.14393.0). Administrators should follow the guidance in the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34336 to remediate this vulnerability.
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-2026-34336","vendor":"Microsoft"}]
Threat ID: 6a03653ccbff5d861008c3e8
Added to database: 05/12/2026, 17:37:00 UTC
Last enriched: 06/25/2026, 21:23:24 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 94
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