CVE-2026-40382: Windows Telephony Service Elevation of Privilege Vulnerability
Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges locally.
Other sources
Windows Telephony Service Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23181Patch KB5087471 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.26079Patch KB5087470 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9140Patch KB5087537 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.2113Patch KB5089548 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.32860Fixed in 10.0.26100.32772Patch KB5087423 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.8457Fixed in 10.0.26100.8390Patch KB5089466 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7219Patch KB5093998 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.25398.2330Patch KB5087541 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7079Patch KB5087420 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.8457Fixed in 10.0.26200.8390Patch KB5089466 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19045.7417Patch KB5094127 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7291Patch KB5087544 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5139Fixed in 10.0.20348.5074Patch KB5087424 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.8755Patch KB5087538
Event History
Frequently Asked Questions
What is the severity of CVE-2026-40382?
CVE-2026-40382 is classified as a elevation of privilege vulnerability that could allow an attacker to gain unauthorized access to system resources.
How do I fix CVE-2026-40382?
To remediate CVE-2026-40382, apply the latest security updates provided by Microsoft for your Windows version.
Which versions of Windows are affected by CVE-2026-40382?
CVE-2026-40382 affects various versions of Windows, including Windows Server 2012, 2012 R2, 2016, 2019, 2022, and certain versions of Windows 10 and 11.
Can CVE-2026-40382 be exploited remotely?
CVE-2026-40382 requires local access, meaning an authenticated attacker must be present on the system to exploit the vulnerability.
What are the potential impacts of CVE-2026-40382?
Exploitation of CVE-2026-40382 could allow an attacker to elevate privileges and execute arbitrary code with elevated permissions.