Mar 2026: Windows Telephony Service Elevation of Privilege Vulnerability
CVE-2026-25188 Published on March 10, 2026

Windows Telephony Service Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Telephony Service allows an unauthorized attacker to elevate privileges over an adjacent network.

Vendor Advisory NVD

Weakness Type

Heap-based Buffer Overflow

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Products Associated with CVE-2026-25188

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Microsoft Windows 11 26h1

Microsoft Windows 10

Microsoft Windows Server 2019

Microsoft Windows Server 2022

Microsoft Windows Server 2025

Microsoft Windows 11 25h2

Microsoft Windows 11 23h2

Microsoft Windows Server 23h2

Microsoft Windows 11 24h2

Microsoft Windows Server 2016

Microsoft Windows Server 2012

Microsoft Windows Server 2012 R2

Affected Versions

Microsoft Windows 10 Version 1607:

Version 10.0.14393.0 and below 10.0.14393.8957 is affected.

Microsoft Windows 10 Version 1809:

Version 10.0.17763.0 and below 10.0.17763.8511 is affected.

Microsoft Windows 10 Version 21H2:

Version 10.0.19044.0 and below 10.0.19044.7058 is affected.

Microsoft Windows 10 Version 22H2:

Version 10.0.19045.0 and below 10.0.19045.7058 is affected.

Microsoft Windows 11 version 22H3:

Version 10.0.22631.0 and below 10.0.22631.6783 is affected.

Microsoft Windows 11 Version 23H2:

Version 10.0.22631.0 and below 10.0.22631.6783 is affected.

Microsoft Windows 11 Version 24H2:

Version 10.0.26100.0 and below 10.0.26100.8037 is affected.

Microsoft Windows 11 Version 25H2:

Version 10.0.26200.0 and below 10.0.26200.8037 is affected.

Microsoft Windows 11 version 26H1:

Version 10.0.28000.0 and below 10.0.28000.1719 is affected.

Microsoft Windows 11 Version 26H1:

Version 10.0.28000.0 and below 10.0.28000.1719 is affected.

Microsoft Windows Server 2012:

Version 6.2.9200.0 and below 6.2.9200.25973 is affected.

Microsoft Windows Server 2012 (Server Core installation):

Version 6.2.9200.0 and below 6.2.9200.25973 is affected.

Microsoft Windows Server 2012 R2:

Version 6.3.9600.0 and below 6.3.9600.23074 is affected.

Microsoft Windows Server 2012 R2 (Server Core installation):

Version 6.3.9600.0 and below 6.3.9600.23074 is affected.

Microsoft Windows Server 2016:

Version 10.0.14393.0 and below 10.0.14393.8957 is affected.

Microsoft Windows Server 2016 (Server Core installation):

Version 10.0.14393.0 and below 10.0.14393.8957 is affected.

Microsoft Windows Server 2019:

Version 10.0.17763.0 and below 10.0.17763.8511 is affected.

Microsoft Windows Server 2019 (Server Core installation):

Version 10.0.17763.0 and below 10.0.17763.8511 is affected.

Microsoft Windows Server 2022:

Version 10.0.20348.0 and below 10.0.20348.4893 is affected.

Microsoft Windows Server 2022, 23H2 Edition (Server Core installation):

Version 10.0.25398.0 and below 10.0.25398.2207 is affected.

Microsoft Windows Server 2025:

Version 10.0.26100.0 and below 10.0.26100.32522 is affected.

Microsoft Windows Server 2025 (Server Core installation):

Version 10.0.26100.0 and below 10.0.26100.32522 is affected.

Mar 2026: Windows Telephony Service Elevation of Privilege VulnerabilityCVE-2026-25188 Published on March 10, 2026

Weakness Type

Heap-based Buffer Overflow

Products Associated with CVE-2026-25188

Affected Versions

Mar 2026: Windows Telephony Service Elevation of Privilege Vulnerability
CVE-2026-25188 Published on March 10, 2026