Privilege escalation in Microsoft Windows Update Stack

1) Sensitive Data Storage in Improperly Locked Memory

EUVDB-ID: #VU107192

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-27475

CWE-ID: CWE-591 - Sensitive Data Storage in Improperly Locked Memory

Exploit availability: No

Description

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

The vulnerability exists due to sensitive data storage in improperly locked memory in Windows Update Stack. A local user can win a race condition and gain elevated privileges on the target system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows: 10 1607 10.0.14393.10 - 11 24H2 10.0.26100.3476

CPE2.3

• cpe:2.3:o:microsoft:windows:10_1607:10.0.14393.10:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1607:10.0.14393.33:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1607:10.0.14393.51:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1607:10.0.14393.68:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1607:10.0.14393.82:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1607:10.0.14393.105:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1607:10.0.14393.148:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:*:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows:10_1607:10.0.14393.187:*:*:*:*:*:*

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-27475

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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