CVE-2026-45487

highCVSS 7.8covered by 1 sourcefirst seen 2026-06-09

Time-of-check time-of-use (TOCTOU) race condition in Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.

CSIRTS triage

What: A time-of-check time-of-use (TOCTOU) race condition allows an authorized attacker to elevate privileges locally.
Who is affected: Authorized users of Windows with the Program Compatibility Assistant Service.
Urgency: Remediation is urgent due to the high severity and potential for privilege escalation.
Action: Apply the latest security patch for Windows.

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

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Exploitation outlook

Low exploitation risk0.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-45487: Windows Program Compatibility Assistant Service Elevation of Privilege Vulnerabilitymsrc · 2026-06-09

External references

NVD record for CVE-2026-45487

CVE.org record

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