What is CVE-2025-21360?

CVE-2025-21360 is a high-severity vulnerability in Microsoft Autoupdate, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2025-01-14.

How severe is CVE-2025-21360?

High severity. CVSS v3 base score is 7.8 out of 10.

Privilege escalation in Microsoft Autoupdate

CVE-2025-21360

Microsoft AutoUpdate (MAU) Elevation of Privilege Vulnerability

Vulnerability class: Privilege Escalation

Published 2025-01-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (36.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Microsoft Autoupdate
Microsoft Autoupdate For Mac — versions 4.0.0

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21360 (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-21360?: CVE-2025-21360 is a high-severity vulnerability in Microsoft Autoupdate, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2025-01-14.
How severe is CVE-2025-21360?: High severity. CVSS v3 base score is 7.8 out of 10.