CVE-2025-55317 Microsoft AutoUpdate (MAU) Elevation of Privilege Vulnerability

High 7.8 Published 9 Sep 2025 Updated 26 Feb 2026

An authorized local attacker can exploit improper link resolution in Microsoft AutoUpdate for Mac to elevate privileges.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-55317?

CVE-2025-55317 is a high-severity path traversal vulnerability in Microsoft AutoUpdate for Mac, published on 9 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

Weakness: CWE-59

Which versions are affected by CVE-2025-55317?

It affects 1 product.

Products include Microsoft Autoupdate.

How do I fix CVE-2025-55317?

No fix has been published for CVE-2025-55317 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2025-55317 being exploited?

There is no known exploitation of CVE-2025-55317 in the wild and no public exploit code.

Sources

Also known as GHSA-9f84-fg53-w8q5.