CVE-2025-48799

Windows Update Service Elevation of Privilege Vulnerability

Improper link resolution before file access ('link following') in Windows Update Service allows an authorized attacker to elevate privileges locally.

Affected

Microsoft · Windows 10 Version 1607 · Windows 10 Version 1809 · Windows 10 Version 21H2 · Windows 10 Version 22H2 · Windows 11 version 22H2 · Windows 11 version 22H3

CVSS v3.1 MICROSOFT

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

1.26% chance of exploitation in the next 30 days, 69th percentile

Published

2025-07-08

Updated

2026-02-13

Proof-of-concept exploits (5)

• https://www.vicarius.io/vsociety/posts/cve-2025-48799-detection-script-elevation-of-privi…
• https://www.vicarius.io/vsociety/posts/cve-2025-48799-mitigation-script-elevation-of-priv…
• Wh04m1001/CVE-2025-48799266★ · 2025-07-08
• painoob/CVE-2025-487990★ · 2025-08-05
• gmh5225/CVE-2025-48799-0★ · 2025-08-30

Security advisories

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-48799

References

• CVE Record
• NVD entry

Related

• CVE-2021-36934
• CVE-2022-3368
• CVE-2023-20178
• CVE-2023-21752
• CVE-2023-29343
• CVE-2023-36723