Read the docs
Microsoft update

KB5129956

Security Update

View on Microsoft →

Fixed in

Fixes 1 record

Priority MEDIUM 45

Weak authentication in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

CVSS 3.1HIGH 8.8 Network Low privileges No interaction EPSS 0.02749 Published 2026-10-02 Fixed in 15.01.2507.075, 15.02.1544.048 +2 CWE-1390