Microsoft Windows: Windows Storage Elevation of Privilege Vulnerability (CVE-2025-21391) #shorts

Summary

Today, we're diving into a critical vulnerability identified as CVE-2025-21391, a Windows Storage Elevation of Privilege Vulnerability. Published on February 11, 2025, this vulnerability was part of the updates released during Microsoft's February 2025 Patch Tuesday, addressing a total of 56 vulnerabilities.

Product Details

The CVE-2025-21391 affects a range of Microsoft products, particularly Windows operating systems including Windows 10 Versions 1507, 1607, 1809, 21H2, and 22H2, Windows 11 Versions 22H2, 22H3, 23H2, and 24H2. It also impacts Windows Server 2016, 2019, 2022, and the upcoming Windows Server 2025 configurations.

Vulnerability Type Summary

This vulnerability falls under the category of CWE-59: Improper Link Resolution Before File Access ('Link Following'), which could allow attackers to gain elevated privileges through improper handling of file paths.

Details of the Vulnerability

CVE-2025-21391 is an elevation of privilege vulnerability in the Windows Storage component. This flaw allows attackers to exploit improper link resolution which occurs before file access. By exploiting this vulnerability, attackers can potentially gain escalated privileges and control over the affected systems. Microsoft identified this vulnerability while investigating issue reports, stressing the importance of staying updated with the latest security patches.

Conclusion

It's crucial for organizations and individuals using affected Microsoft products to apply the provided security updates promptly. Ignoring these vulnerabilities leaves systems open to exploitation, particularly given the elevation potential of this flaw. Stay vigilant, update your systems, and ensure your network is protected from emerging threats.

Watch the full video on YouTube: CVE-2025-21391

Remediation and exploitation details

This chain involves the following actors

This following systems are involved

Attack entry point

Remediation actions

Exploitation actions

CVE database technical details

CVE ID

CVE-2025-21391

Description

Windows Storage Elevation of Privilege Vulnerability

Provider

microsoft

CWE / problem types

CWE-59: Improper Link Resolution Before File Access ('Link Following')

Affected Software Versions

Microsoft:Windows 10 Version 1809:[{'version': '10.0.17763.0', 'lessThan': '10.0.17763.6893', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows Server 2019:[{'version': '10.0.17763.0', 'lessThan': '10.0.17763.6893', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows Server 2019 (Server Core installation):[{'version': '10.0.17763.0', 'lessThan': '10.0.17763.6893', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows Server 2022:[{'version': '10.0.20348.0', 'lessThan': '10.0.20348.3207', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows 10 Version 21H2:[{'version': '10.0.19043.0', 'lessThan': '10.0.19044.5487', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows 11 version 22H2:[{'version': '10.0.22621.0', 'lessThan': '10.0.22621.4890', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows 10 Version 22H2:[{'version': '10.0.19045.0', 'lessThan': '10.0.19045.5487', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows Server 2025 (Server Core installation):[{'version': '10.0.26100.0', 'lessThan': '10.0.26100.3194', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows 11 version 22H3:[{'version': '10.0.22631.0', 'lessThan': '10.0.22631.4890', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows 11 Version 23H2:[{'version': '10.0.22631.0', 'lessThan': '10.0.22631.4890', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows Server 2022, 23H2 Edition (Server Core installation):[{'version': '10.0.25398.0', 'lessThan': '10.0.25398.1425', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows 11 Version 24H2:[{'version': '10.0.26100.0', 'lessThan': '10.0.26100.3194', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows Server 2025:[{'version': '10.0.26100.0', 'lessThan': '10.0.26100.3194', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows 10 Version 1507:[{'version': '10.0.10240.0', 'lessThan': '10.0.10240.20915', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows 10 Version 1607:[{'version': '10.0.14393.0', 'lessThan': '10.0.14393.7785', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows Server 2016:[{'version': '10.0.14393.0', 'lessThan': '10.0.14393.7785', 'versionType': 'custom', 'status': 'affected'}],Microsoft:Windows Server 2016 (Server Core installation):[{'version': '10.0.14393.0', 'lessThan': '10.0.14393.7785', 'versionType': 'custom', 'status': 'affected'}]

Date Published

2025-02-11T17:58:17.297Z

Last Updated

2025-03-12T01:42:15.579Z