CVE-2025-27473

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

Uncontrolled resource consumption in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-400

Affected software

VendorProductVersions
MicrosoftWindows 10 Version 1507>= 10.0.10240.0, < 10.0.10240.20978
MicrosoftWindows 10 Version 1607>= 10.0.14393.0, < 10.0.14393.7969
MicrosoftWindows 10 Version 1809>= 10.0.17763.0, < 10.0.17763.7136
MicrosoftWindows 10 Version 21H2>= 10.0.19044.0, < 10.0.19044.5737
MicrosoftWindows 10 Version 22H2>= 10.0.19045.0, < 10.0.19045.5737
MicrosoftWindows 11 version 22H2>= 10.0.22621.0, < 10.0.22621.5189
MicrosoftWindows 11 version 22H3>= 10.0.22631.0, < 10.0.22631.5189
MicrosoftWindows 11 Version 23H2>= 10.0.22631.0, < 10.0.22631.5189
MicrosoftWindows 11 Version 24H2>= 10.0.26100.0, < 10.0.26100.3775
MicrosoftWindows Server 2008 R2 Service Pack 1>= 6.1.7601.0, < 6.1.7601.27670
MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation)>= 6.1.7601.0, < 6.1.7601.27670
MicrosoftWindows Server 2008 Service Pack 2>= 6.0.6003.0, < 6.0.6003.23220
MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation)>= 6.0.6003.0, < 6.0.6003.23220
MicrosoftWindows Server 2012>= 6.2.9200.0, < 6.2.9200.25423
MicrosoftWindows Server 2012 (Server Core installation)>= 6.2.9200.0, < 6.2.9200.25423
MicrosoftWindows Server 2012 R2>= 6.3.9600.0, < 6.3.9600.22523
MicrosoftWindows Server 2012 R2 (Server Core installation)>= 6.3.9600.0, < 6.3.9600.22523
MicrosoftWindows Server 2016>= 10.0.14393.0, < 10.0.14393.7969
MicrosoftWindows Server 2016 (Server Core installation)>= 10.0.14393.0, < 10.0.14393.7969
MicrosoftWindows Server 2019>= 10.0.17763.0, < 10.0.17763.7136
MicrosoftWindows Server 2019 (Server Core installation)>= 10.0.17763.0, < 10.0.17763.7136
MicrosoftWindows Server 2022>= 10.0.20348.0, < 10.0.20348.3453
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)>= 10.0.25398.0, < 10.0.25398.1551
MicrosoftWindows Server 2025>= 10.0.26100.0, < 10.0.26100.3775
MicrosoftWindows Server 2025 (Server Core installation)>= 10.0.26100.0, < 10.0.26100.3775

References

Timeline

Published
Apr 8, 2025
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2025-27473: High severity, CVSS 7.5 | Vulnix