CVE-2025-53156

Windows Storage Port Driver Information Disclosure Vulnerability

CVE-2025-53156 is fixed in 5 products on 1 platform, first by KB5063878, released August 12, 2025. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

Urgent

CVSS

5.5

Important

Exploitation

More likely

Vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0071

53rd percentile

<p>Exposure of sensitive information to an unauthorized actor in Storage Port Driver allows an authorized attacker to disclose information locally.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 11 Version 24H2 for ARM64-based Systems	26100.4946	KB5063878	Aug 12, 2025
Windows 11 Version 24H2 for ARM64-based Systems	26100.4851	KB5064010	Aug 12, 2025
Windows 11 Version 24H2 for x64-based Systems	26100.4946	KB5063878	Aug 12, 2025
Windows 11 Version 24H2 for x64-based Systems	26100.4851	KB5064010	Aug 12, 2025
Windows Server 2022, 23H2 Edition (Server Core installation)	25398.1791	KB5063899	Aug 12, 2025
Windows Server 2025	26100.4946	KB5063878	Aug 12, 2025
Windows Server 2025	26100.4851	KB5064010	Aug 12, 2025
Windows Server 2025 (Server Core installation)	26100.4946	KB5063878	Aug 12, 2025
Windows Server 2025 (Server Core installation)	26100.4851	KB5064010	Aug 12, 2025

Details

Published
August 12, 2025
Weakness
Exposure of Sensitive Information to an Unauthorized Actor
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53156

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