CVE-2026-42974: Windows Performance Monitor Remote Code Execution Vulnerability

highCVSS 8.1CVE-2026-42974

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

CSIRTS triage

vendor: Microsoft product: Windows Performance Monitor Remote code execution

What: An integer underflow in Windows Performance Monitor allows unauthorized remote code execution.
Who is affected: Unauthorized attackers can exploit this vulnerability in Windows Performance Monitor.
Urgency: Remediation is urgent due to the high severity and potential for exploitation.
Action: Patch Windows Performance Monitor to mitigate this vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Windows Performance Monitor

Get an email when a new Windows Performance Monitor advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 8.1
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42974

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-429740.64% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 46% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-42974	coverage & exploitation status	NVD · CVE.org

Recent advisories for Windows Performance Monitor

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-42981: Windows Performance Monitor Remote Code Execution Vulnerabilitymsrc · 2026-06-09