Insecure Storage of Sensitive Information in Microsoft Windows and Windows Server - CVE-2025-21299

Vulnerability identifier: #VU102746

CSH Severity: Low

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-21299

CWE-ID: CWE-922

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to bypass security features.

The vulnerability exists due to insecure storage of sensitive information in Windows Kerberos. A local user can bypass Windows Defender Credential Guard Feature to leak Kerberos Credential.

Microsoft Windows
Windows Server

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.5371, 10 22H2 10.0.19045.5371, 10 1507 10.0.10240.20890, 10 1607 10.0.14393.7699, 10 1809 10.0.17763.6775, 11 22H2 10.0.22621.4751, 11 23H2 10.0.22631.4751, 11 24H2 10.0.26100.3107
Windows Server - addressed in versions 2016 10.0.14393.7785, 2022 23H2 10.0.25398.1369, 2022 10.0.20348.3091, 2025 10.0.26100.2894

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21299

• Multiple vulnerabilities in Microsoft Windows Kerberos