Denial of service condition in Microsoft Windows Security Account Manager (SAM)

1) Deadlock

EUVDB-ID: #VU102698

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-21313

CWE-ID: CWE-833 - Deadlock

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a deadlock issue in Windows Security Account Manager (SAM). A remote user can cause a denial of service condition on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows Server: 2016 10.0.14393.10 - 2025 10.0.26100.2605

CPE2.3

• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.7699:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2022_23H2:10.0.25398.1308:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server:2025:10.0.26100.2605:*:*:*:*:*:*

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21313

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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