CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

CVE-2026-62727: Windows Telephony Service Elevation of Privilege Vulnerability

highCVSS 7CVE-2026-62727
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Telephony Service allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoftproduct: Windows Telephony ServicePrivilege escalation
What
Race condition in Windows Telephony Service allows authorized attackers to escalate privileges locally.
Who is affected
Systems running Windows Telephony Service where authorized users can exploit the race condition.
Urgency
High severity (CVSS 7); privilege escalation requires local authorization but is readily exploitable via race condition timing.
Action
Apply Windows security patches addressing CVE-2026-62727 when released by Microsoft.

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

⚡ Watch Windows Telephony Service

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

Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7
Published
2026-08-11
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62727

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-62727coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Windows Telephony Service

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.

More from Microsoft Security Response Center