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HIGH · 7.1

CVE-2025-27491

Use after free in Windows Hyper-V allows an authorized attacker to execute code over a network.

Vulnerability Description

Use after free in Windows Hyper-V allows an authorized attacker to execute code over a network.

CVSS Score

7.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
MicrosoftWindows 10 1507< 10.0.10240.20978
MicrosoftWindows 10 1607< 10.0.14393.7969
MicrosoftWindows 10 1809< 10.0.17763.7136
MicrosoftWindows 10 21H2< 10.0.19044.5737
MicrosoftWindows 10 22H2< 10.0.19045.5737
MicrosoftWindows 11 22H2< 10.0.22621.5189
MicrosoftWindows 11 23H2< 10.0.22631.5189
MicrosoftWindows 11 24H2< 10.0.26100.3775
MicrosoftWindows Server 2016< 10.0.14393.7969
MicrosoftWindows Server 2019< 10.0.17763.7136
MicrosoftWindows Server 2022< 10.0.20348.3453
MicrosoftWindows Server 2022 23H2< 10.0.25398.1551
MicrosoftWindows Server 2025< 10.0.26100.3775

Related Weaknesses (CWE)

CWE-416

References

FAQ

What is CVE-2025-27491?

CVE-2025-27491 is a vulnerability with a CVSS score of 7.1 (HIGH). Use after free in Windows Hyper-V allows an authorized attacker to execute code over a network.

How severe is CVE-2025-27491?

CVE-2025-27491 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-27491?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21H2, Microsoft Windows 10 22H2.