1. Home
  2. CVE Database
  3. CVE-2026-42981
HIGH · 8.1

CVE-2026-42981

Integer underflow (wrap or wraparound) in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.

Vulnerability Description

Integer underflow (wrap or wraparound) in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.

CVSS Score

8.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
MicrosoftWindows 11 23H2< 10.0.22631.7219
MicrosoftWindows 11 24H2< 10.0.26100.8655
MicrosoftWindows 11 25H2< 10.0.26200.8655
MicrosoftWindows 11 26H1< 10.0.28000.2269
MicrosoftWindows Server 2022< 10.0.20348.5256
MicrosoftWindows Server 2025< 10.0.26100.32995

Related Weaknesses (CWE)

CWE-191

References

FAQ

What is CVE-2026-42981?

CVE-2026-42981 is a vulnerability with a CVSS score of 8.1 (HIGH). Integer underflow (wrap or wraparound) in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.

How severe is CVE-2026-42981?

CVE-2026-42981 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-42981?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 11 23H2, Microsoft Windows 11 24H2, Microsoft Windows 11 25H2, Microsoft Windows 11 26H1, Microsoft Windows Server 2022.