🛡️ CVE-2025-27491 — windows-10-1507

🟠 CVSS 7.1 — High ✅ No Known Exploit CWE-416 NVD
7.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs low-level privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2025-27491 is classified as CWE-416: Use After Free. Memory is used after being released, so its contents may already belong to something else.

Affected software

CVE-2025-27491 is recorded against 13 packages.

  • windows-10-1507 (fixed in 10.0.10240.20978)
  • windows-10-1607 (fixed in 10.0.14393.7969)
  • windows-10-1809 (fixed in 10.0.17763.7136)
  • windows-10-21h2 (fixed in 10.0.19044.5737)
  • windows-10-22h2 (fixed in 10.0.19045.5737)
  • windows-11-22h2 (fixed in 10.0.22621.5189)
  • windows-11-23h2 (fixed in 10.0.22631.5189)
  • windows-11-24h2 (fixed in 10.0.26100.3775)
  • windows-server-2016 (fixed in 10.0.14393.7969)
  • windows-server-2019 (fixed in 10.0.17763.7136)
  • windows-server-2022 (fixed in 10.0.20348.3453)
  • windows-server-2022-23h2 (fixed in 10.0.25398.1551)
  • windows-server-2025 (fixed in 10.0.26100.3775)

Timeline and source

Published on 8 April 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

msrc.microsoft.com

Details

Severity HIGH
CVSS Score 7.1
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CWE CWE-416
Public Exploit ✅ No
Source NVD
Published 2025-04-08
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
windows-10-1507 10.0.10240.20978
windows-10-1607 10.0.14393.7969
windows-10-1809 10.0.17763.7136
windows-10-21h2 10.0.19044.5737
windows-10-22h2 10.0.19045.5737
windows-11-22h2 10.0.22621.5189
windows-11-23h2 10.0.22631.5189
windows-11-24h2 10.0.26100.3775
windows-server-2016 10.0.14393.7969
windows-server-2019 10.0.17763.7136
windows-server-2022 10.0.20348.3453
windows-server-2022-23h2 10.0.25398.1551
windows-server-2025 10.0.26100.3775

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