Read the docs
Microsoft update

KB5121611

Security Update

View on Microsoft →

Fixed in

Fixes 8 records

Priority MEDIUM 43

Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

CVSS 3.1CRITICAL 9.1 Network High privileges No interaction EPSS 0.00862 Published 2026-09-08 Fixed in 15.01.2507.073, 15.02.1544.046 +2 CWE-862
Priority MEDIUM 43

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

CVSS 3.1CRITICAL 9.3 Network No auth User interaction EPSS 0.00756 Published 2026-09-08 Fixed in 15.01.2507.073, 15.02.1544.046 +2 CWE-79
Priority MEDIUM 42

External control of file name or path in Microsoft Exchange Server allows an authorized attacker to execute code over a network.

CVSS 3.1HIGH 8.8 Network Low privileges No interaction EPSS 0.00913 Published 2026-09-08 Fixed in 15.01.2507.073, 15.02.1544.046 +2 CWE-73
Priority LOW 38

Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

CVSS 3.1HIGH 8.1 Network Low privileges No interaction EPSS 0.00689 Published 2026-09-08 Fixed in 15.01.2507.073, 15.02.1544.046 +2 CWE-862
Priority LOW 35

Uncontrolled recursion in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.01174 Published 2026-09-08 Fixed in 15.01.2507.073, 15.02.1544.046 +2 CWE-674
Priority LOW 30

Authorization bypass through user-controlled key in Microsoft Exchange Server allows an authorized attacker to perform tampering over a network.

CVSS 3.1MEDIUM 6.5 Network Low privileges No interaction EPSS 0.00644 Published 2026-09-08 Fixed in 15.01.2507.073, 15.02.1544.046 +2 CWE-639
Priority LOW 30

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.

CVSS 3.1MEDIUM 6.5 Network Low privileges No interaction EPSS 0.0084 Published 2026-09-08 Fixed in 15.01.2507.073, 15.02.1544.046 +2 CWE-918
Priority LOW 27

Use of a broken or risky cryptographic algorithm in Microsoft Exchange Server allows an unauthorized attacker to disclose information over a network.

CVSS 3.1MEDIUM 5.9 Network No auth No interaction EPSS 0.00471 Published 2026-09-08 Fixed in 15.01.2507.073, 15.02.1544.046 +2 CWE-327