Exposed dangerous method or function in Microsoft Exchange Server - CVE-2023-21529
Published: February 14, 2023 / Updated: April 13, 2026
Vulnerability identifier: #VU72174
CSH Severity: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber
CVE-ID: CVE-2023-21529
CWE-ID: CWE-749
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
Microsoft Exchange Server
Microsoft Exchange Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a remote user to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation within the MultiValuedProperty class. A remote user can send a specially crafted request and execute arbitrary code in the context of the server's account.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install updates from vendor's website.