CVE-2026-62727

Undergoing Analysis Undergoing Analysis - In Progress

Race Condition in Windows Telephony Service

Publication date: 2026-08-19

Last updated on: 2026-08-24

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-19

Last Modified

2026-08-24

Generated

2026-09-09

AI Q&A

2026-08-20

EPSS Evaluated

2026-09-07

NVD

CVE-2026-62727

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_telephony_service	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-362	The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Attack-Flow Graph

Executive Summary

This is a race condition vulnerability in Windows Telephony Service where improper synchronization during concurrent execution allows an authorized attacker to elevate privileges locally. It occurs due to shared resource access without proper controls.

Detection Guidance

This vulnerability involves a race condition in Windows Telephony Service. Detection requires checking for unusual privilege escalation patterns or service inconsistencies. Use Event Viewer to review Windows logs for telephony service errors or unexpected privilege changes. Check for unauthorized modifications to telephony service configurations or executables.

Impact Analysis

An attacker could exploit this to gain higher privileges on your system, potentially allowing them to install programs, view or delete data, or create new accounts with full user rights.

Compliance Impact

This vulnerability allows local privilege escalation through a race condition in Windows Telephony Service. While not directly impacting GDPR or HIPAA, such vulnerabilities could lead to unauthorized access to sensitive data, potentially violating confidentiality requirements under these regulations if exploited.

Mitigation Strategies

Apply the latest security updates from Microsoft for Windows Telephony Service to patch the race condition vulnerability.

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