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
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
microsoftwindows_10_1607
𝑥
< 10.0.14393.8957
microsoftwindows_10_1607
𝑥
< 10.0.14393.8957
microsoftwindows_10_1809
𝑥
< 10.0.17763.8511
microsoftwindows_10_1809
𝑥
< 10.0.17763.8511
microsoftwindows_10_21h2
𝑥
< 10.0.19044.7058
microsoftwindows_10_21h2
𝑥
< 10.0.19044.7058
microsoftwindows_10_21h2
𝑥
< 10.0.19044.7058
microsoftwindows_10_22h2
𝑥
< 10.0.19045.7058
microsoftwindows_10_22h2
𝑥
< 10.0.19045.7058
microsoftwindows_10_22h2
𝑥
< 10.0.19045.7058
microsoftwindows_11_23h2
𝑥
< 10.0.22631.6783
microsoftwindows_11_23h2
𝑥
< 10.0.22631.6783
microsoftwindows_11_24h2
𝑥
< 10.0.26100.7979
microsoftwindows_11_24h2
𝑥
< 10.0.26100.7979
microsoftwindows_11_25h2
𝑥
< 10.0.26200.7979
microsoftwindows_11_25h2
𝑥
< 10.0.26200.7979
microsoftwindows_11_26h1
𝑥
< 10.0.28000.1719
microsoftwindows_11_26h1
𝑥
< 10.0.28000.1719
microsoftwindows_server_2012
-
microsoftwindows_server_2016
𝑥
< 10.0.14393.8957
microsoftwindows_server_2019
𝑥
< 10.0.17763.8511
microsoftwindows_server_2022
𝑥
< 10.0.20348.4830
microsoftwindows_server_2022_23h2
𝑥
< 10.0.25398.2207
microsoftwindows_server_2025
𝑥
< 10.0.26100.32463
𝑥
= Vulnerable software versions
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 (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