CVE-2023-21529

Microsoft Exchange Server Remote Code Execution Vulnerability

State: Published
Severity: 8.8 High
Published: Feb 14, 2023
Updated: Aug 19, 2026
Reserved: Dec 1, 2022

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-502 Deserialization of Untrusted Data

Affected Products

Product	Versions
Microsoft Exchange Server 2013 Cumulative Update 23Microsoft	15.00.0 to before 15.00.1497.047Affected
Microsoft Exchange Server 2016 Cumulative Update 23Microsoft	15.01.0 to before 15.01.2507.021Affected
Microsoft Exchange Server 2019 Cumulative Update 11Microsoft	15.02.0 to before 15.02.0986.041Affected
Microsoft Exchange Server 2019 Cumulative Update 12Microsoft	15.02.0 to before 15.02.1118.025Affected

References

Microsoft Exchange Server Remote Code Execution Vulnerabilityvendor-advisorypatch
https://www.microsoft.com/en-us/security/blog/2026/04/06/storm-1175-focuses-gaze-on-vulnerable-web-facing-assets-in-high-tempo-medusa-ransomware-operations/vendor-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21529government-resource

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