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Fencer Vulns
high 8.1

CVE-2026-42974 json

Windows Performance Monitor Remote Code Execution Vulnerability

published 2026-06-09 5 mo ago modified 2026-09-24 45 d ago also EUVD-2026-35736

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

Integer overflow or wraparound in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.

Patch / fix

  • Microsoft Windows 11 version 23H2 10.0.22631.7219
  • Microsoft Windows 11 Version 24H2 10.0.26100.8655
  • Microsoft Windows 11 Version 25H2 10.0.26200.8655
  • Microsoft Windows 11 version 26H1 10.0.28000.2269
  • Microsoft Windows Server 2022 10.0.20348.5256
  • Microsoft Windows Server 2025 10.0.26100.32995
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.32995

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

0.64% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Microsoft Windows 11 version 23H2
  • Microsoft Windows 11 Version 24H2
  • Microsoft Windows 11 Version 25H2
  • Microsoft Windows 11 version 26H1
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.