CVE-2026-42896: CWE-190: Integer Overflow or Wraparound in Microsoft Windows 11 Version 24H2
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 condition within the Windows Desktop Window Manager (DWM) Core Library in Windows 11 Version 24H2 (build 10.0.26100.0). Exploitation requires local access with some privileges and can lead to privilege escalation, allowing the attacker to gain higher-level permissions on the affected system. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate their privileges, potentially leading to full control of the affected system. The vulnerability impacts confidentiality, integrity, and availability as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42896 to remediate this vulnerability.
CVE-2026-42896: CWE-190: Integer Overflow or Wraparound in Microsoft Windows 11 Version 24H2
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 condition within the Windows Desktop Window Manager (DWM) Core Library in Windows 11 Version 24H2 (build 10.0.26100.0). Exploitation requires local access with some privileges and can lead to privilege escalation, allowing the attacker to gain higher-level permissions on the affected system. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate their privileges, potentially leading to full control of the affected system. The vulnerability impacts confidentiality, integrity, and availability as indicated by the CVSS vector (C:H/I:H/A:H). There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42896 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T22:35:54.967Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42896","vendor":"Microsoft"}]
Threat ID: 6a036564cbff5d861008cc9c
Added to database: 05/12/2026, 17:37:40 UTC
Last enriched: 06/25/2026, 21:27:24 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 57
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