Privilege escalation in Microsoft Exchange Server

Published: 2022-05-11
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-21978
Exploitation vector Local
Public exploit N/A
Vulnerable software
Microsoft Exchange Server
Server applications / Mail servers

Vendor Microsoft

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU62993

Risk: Low


CVE-ID: CVE-2022-21978

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No


The vulnerability allows a local administrator to escalate privileges on the system.

The vulnerability exists due to application does not properly impose security restrictions in Microsoft Exchange Server, which leads to security restrictions bypass and privilege escalation.


Install updates from vendor's website.

Vulnerable software versions

Microsoft Exchange Server: 2016 Cumulative Update 22 15.01.2375.007 - 2016 Cumulative Update 23 15.01.2507.006, 2019 Cumulative Update 11 15.02.0986.005 - 2019 Cumulative Update 12 15.02.1118.007, 2013 Cumulative Update 23 15.00.1497.002

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?