Permissions, Privileges, and Access Controls in Microsoft Exchange Server - CVE-2021-34523
Published: July 13, 2021 / Updated: September 7, 2021
Vulnerability identifier: #VU54704
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:A/U:Clear
CVE-ID: CVE-2021-34523
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: Microsoft
Affected software:
Microsoft Exchange Server
Microsoft Exchange Server
Detailed vulnerability description
The vulnerability allows a remote local to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions in the Microsoft Exchange Server, which leads to security restrictions bypass and privilege escalation.
How to mitigate CVE-2021-34523
Install updates from vendor's website.