CVE-2026-42981: CWE-191: Integer Underflow (Wrap or Wraparound) in Microsoft Windows 11 version 23H2
Integer underflow (wrap or wraparound) in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability involves an integer underflow (wrap or wraparound) in the Windows Performance Monitor on Windows 11 version 23H2 (build 10.0.22631.0). Exploitation could allow an attacker without privileges or user interaction to execute arbitrary code remotely. The vulnerability is tracked as CVE-2026-42981 and is classified under CWE-191 (Integer Underflow). Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability could result in remote code execution with high impact on confidentiality, integrity, and availability of the affected system. An attacker can execute arbitrary code remotely without requiring user interaction or privileges, potentially leading to full system compromise.
Mitigation Recommendations
An official fix is available from Microsoft to remediate this vulnerability. Users and administrators should apply the security update provided by Microsoft as soon as possible. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42981 for detailed patching instructions.
CVE-2026-42981: CWE-191: Integer Underflow (Wrap or Wraparound) in Microsoft Windows 11 version 23H2
Description
Integer underflow (wrap or wraparound) in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.
CVSS v3.1
Score 8.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer underflow (wrap or wraparound) in the Windows Performance Monitor on Windows 11 version 23H2 (build 10.0.22631.0). Exploitation could allow an attacker without privileges or user interaction to execute arbitrary code remotely. The vulnerability is tracked as CVE-2026-42981 and is classified under CWE-191 (Integer Underflow). Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability could result in remote code execution with high impact on confidentiality, integrity, and availability of the affected system. An attacker can execute arbitrary code remotely without requiring user interaction or privileges, potentially leading to full system compromise.
Mitigation Recommendations
An official fix is available from Microsoft to remediate this vulnerability. Users and administrators should apply the security update provided by Microsoft as soon as possible. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42981 for detailed patching instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T23:43:50.745Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42981","vendor":"Microsoft"}]
Threat ID: 6a284cc88dd33fbd856648e5
Added to database: 06/09/2026, 17:26:32 UTC
Last enriched: 07/29/2026, 21:49:57 UTC
Last updated: 07/31/2026, 19:30:13 UTC
Views: 72
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