CVE-2025-27491

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

CVE

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

HIGH · CVSS 7.1 EPSS 0.00982

Schedule remediation

CVSS base score ≥ 7.0

Sigma rules0 YARA rules0

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Weakness Classification

CWE-416Use After Free

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Affected Products & Versions

microsoft windows 10 1507< 10.0.10240.20978
microsoft windows 10 1607< 10.0.14393.7969
microsoft windows 10 1809< 10.0.17763.7136
microsoft windows 10 21h2< 10.0.19044.5737
microsoft windows 10 22h2< 10.0.19045.5737
microsoft windows 11 22h2< 10.0.22621.5189
microsoft windows 11 23h2< 10.0.22631.5189
microsoft windows 11 24h2< 10.0.26100.3775
Show all 13 affected productsmicrosoft windows server 2016< 10.0.14393.7969
microsoft windows server 2019< 10.0.17763.7136
microsoft windows server 2022< 10.0.20348.3453
microsoft windows server 2022 23h2< 10.0.25398.1551
microsoft windows server 2025< 10.0.26100.3775

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Scoring & Timeline

7.1

HIGH · CVSS v3.1 · secure@microsoft.com

View on NVD

Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

Published to NVD08 Apr 2025 · 06:16 PM

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

SSVC triage · cisa-vulnrichment

Exploitation

none

Automatable

Technical impact

total

SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.

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Vendor Advisories

msrcCVE-2025-27491Remote Code Execution

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External lookups - second-class, for what we don’t hold ourselves

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Compliance
NIST 800-53
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