Privilege escalation via Telephony Service race
Published Aug 19, 2026 · Updated Aug 25, 2026
Race condition in Windows Telephony Service in Microsoft Windows allows local users to gain elevated privileges via shared-resource access. Microsoft's public record identifies only improper synchronization on a shared resource and does not disclose the code path or state transition that can be raced. Local authenticated access is required, and the published CVSS vector indicates a successful race can yield full compromise of confidentiality, integrity, and availability on the affected host.
Summary
What happened
Race condition in Windows Telephony Service in Microsoft Windows allows local users to gain elevated privileges via shared-resource access. Microsoft's public record identifies only improper synchronization on a shared resource and does not disclose the code path or state transition that can be raced. Local authenticated access is required, and the published CVSS vector indicates a successful race can yield full compromise of confidentiality, integrity, and availability on the affected host.
The record
- CVE
- CVE-2026-62727
- Published
- Aug 19, 2026
- Updated
- Aug 25, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-362, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 19, 2026CVE publishedPublication date reported by the CVE source.
- Aug 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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