CVE-2026-42912

highCVSS 7covered by 1 sourcefirst seen 2026-06-09

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Telephony Service allows an authorized attacker to elevate privileges locally.

CSIRTS triage

What: A race condition in Windows Telephony Service allows an authorized attacker to elevate privileges.
Who is affected: Authorized users of Windows Telephony Service.
Urgency: Remediation is urgent due to the high severity rating, although exploitation is not currently reported.
Action: Apply the latest security updates for Windows Telephony Service.

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

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Exploitation outlook

Low exploitation risk0.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-42912: Windows Telephony Service Elevation of Privilege Vulnerabilitymsrc · 2026-06-09

External references

NVD record for CVE-2026-42912

CVE.org record

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