Vulnerability in Microsoft Autoupdate
CVE-2025-55317
Improper link resolution before file access ('link following') in Microsoft AutoUpdate (MAU) allows an authorized attacker to elevate privileges locally.
EPSS: 0.004 (30.5th percentile) — read the EPSS interpretation.
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.
Affected products
- Microsoft Autoupdate
- Microsoft Autoupdate For Mac — versions 4.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-55317?
- CVE-2025-55317 is a high-severity vulnerability in Microsoft Autoupdate, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2025-09-09.
- How severe is CVE-2025-55317?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2025-55317 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.