CVE-2026-25170

EUVD-2026-10634
Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7 HIGH
LOCAL
HIGH
LOW
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
microsoftCNA
7 HIGH
CVSS:3.1/AV:L/AC:H/PR:L/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 11
23H2 (arm64, x64)
KB5078883
24H2 (arm64, x64)
KB5079420
25H2 (arm64, x64)
KB5079420
26H1 (arm64, x64)
KB5079466
Windows Server 2022
23H2 Server Core
KB5078734
Server Core
KB5078737
Standard
KB5078737
Windows Server 2025
Server Core
KB5078736
Standard
KB5078736
Common Weakness Enumeration
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-25170