CVE-2026-25188

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

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

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-122

Affected software

Vendor	Product	Versions
Microsoft	Windows 10 Version 1607	>= 10.0.14393.0, < 10.0.14393.8957
Microsoft	Windows 10 Version 1809	>= 10.0.17763.0, < 10.0.17763.8511
Microsoft	Windows 10 Version 21H2	>= 10.0.19044.0, < 10.0.19044.7058
Microsoft	Windows 10 Version 22H2	>= 10.0.19045.0, < 10.0.19045.7058
Microsoft	Windows 11 version 22H3	>= 10.0.22631.0, < 10.0.22631.6783
Microsoft	Windows 11 Version 23H2	>= 10.0.22631.0, < 10.0.22631.6783
Microsoft	Windows 11 Version 24H2	>= 10.0.26100.0, < 10.0.26100.8037
Microsoft	Windows 11 Version 25H2	>= 10.0.26200.0, < 10.0.26200.8037
Microsoft	Windows 11 version 26H1	>= 10.0.28000.0, < 10.0.28000.1719
Microsoft	Windows Server 2012	>= 6.2.9200.0, < 6.2.9200.25973
Microsoft	Windows Server 2012 (Server Core installation)	>= 6.2.9200.0, < 6.2.9200.25973
Microsoft	Windows Server 2012 R2	>= 6.3.9600.0, < 6.3.9600.23074
Microsoft	Windows Server 2012 R2 (Server Core installation)	>= 6.3.9600.0, < 6.3.9600.23074
Microsoft	Windows Server 2016	>= 10.0.14393.0, < 10.0.14393.8957
Microsoft	Windows Server 2016 (Server Core installation)	>= 10.0.14393.0, < 10.0.14393.8957
Microsoft	Windows Server 2019	>= 10.0.17763.0, < 10.0.17763.8511
Microsoft	Windows Server 2019 (Server Core installation)	>= 10.0.17763.0, < 10.0.17763.8511
Microsoft	Windows Server 2022	>= 10.0.20348.0, < 10.0.20348.4893
Microsoft	Windows Server 2022, 23H2 Edition (Server Core installation)	>= 10.0.25398.0, < 10.0.25398.2207
Microsoft	Windows Server 2025	>= 10.0.26100.0, < 10.0.26100.32522
Microsoft	Windows Server 2025 (Server Core installation)	>= 10.0.26100.0, < 10.0.26100.32522

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-25188Vendor Advisory

Timeline

Published: Mar 10, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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