CVE-2025-55317: Microsoft Autoupdate

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Improper link resolution before file access ('link following') in Microsoft AutoUpdate (MAU) allows an authorized attacker to elevate privileges locally.

Affected products

• Microsoft Autoupdate: before 4.80 (fixed in 4.80)

Published 2025-09-09. Last modified 2026-06-17.