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CVE-2022-41123: Microsoft Exchange Server Elevation of Privilege Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-09 · updated 2026-08-10

Description

Microsoft Exchange Server Elevation of Privilege Vulnerability

Affected products

• Microsoft Exchange Server: 2016-cumulative_update_22, 2016-cumulative_update_23, 2019-cumulative_update_11, 2019-cumulative_update_12
• Microsoft Exchange Server 2016 Cumulative Update 22: from 15.0.0 before 15.01.2375.037 — fixed in 15.01.2375.037
• Microsoft Exchange Server 2016 Cumulative Update 23: from 15.01.0 before 15.01.2507.016 — fixed in 15.01.2507.016
• Microsoft Exchange Server 2019 Cumulative Update 11: from 15.02.0 before 15.02.0986.036 — fixed in 15.02.0986.036
• Microsoft Exchange Server 2019 Cumulative Update 12: from 15.02.0 before 15.02.1118.020 — fixed in 15.02.1118.020

How to fix

Upgrade to a fixed version: Microsoft Exchange Server 2016 Cumulative Update 22 15.01.2375.037; Microsoft Exchange Server 2016 Cumulative Update 23 15.01.2507.016; Microsoft Exchange Server 2019 Cumulative Update 11 15.02.0986.036; Microsoft Exchange Server 2019 Cumulative Update 12 15.02.1118.020. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41123
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41123

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