#VU102652 Out-of-bounds read in Windows and Windows Server - CVE-2025-21341

Vulnerability identifier: #VU102652

Vulnerability risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-21341

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary condition in Windows Digital Media. An authenticated attacker with physical access can plug in a malicious USB drive, trigger an out-of-bounds read error and gain elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: before 10 21H2, 10 22H2, 10 1507, 10 1607, 10 1809, 11 22H2, 11 23H2, 11 24H2, 10 21H2, 10 21H2, 10 21H2, 10 21H2, 10 21H2, 10 21H2, 10 21H2, 10 21H2

Windows Server: before 2008 R2, 2008, 2012 R2, 2012, 2016, 2022 23H2, 2022, 2025, 2008 R2, 2008 R2, 2008 R2, 2008 R2, 2008 R2

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21341

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Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.