CVE-2026-25188

EUVD-2026-10661
Heap-based buffer overflow in Windows Telephony Service allows an unauthorized attacker to elevate privileges over an adjacent network.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.8 HIGH
ADJACENT_NETWORK
LOW
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
microsoftCNA
8.8 HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Windows Releases
Platform
Version
Windows 10
1607 (x64, x86)
1809 (x64, x86)
21H2 (arm64, x64, x86)
22H2 (arm64, x64, x86)
Windows 11
23H2 (arm64, x64)
24H2 (arm64, x64)
25H2 (arm64, x64)
26H1 (arm64, x64)
Windows Server 2012
Server Core
Standard
Windows Server 2012 R2
Server Core
Standard
Windows Server 2016
Server Core
Standard
Windows Server 2019
Server Core
Standard
Windows Server 2022
23H2 Server Core
Server Core
Standard
Windows Server 2025
Server Core
Standard