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CVE-2026-40402criticalCWE-416

Windows Hyper-V Elevation of Privilege Vulnerability

28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.3epss 0.3%
exploitation probability
0.3%top 73% of all CVEs
observed exploitation
nono source reports it
Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C