CVE Database · CVE-2021-34523
CVSS v3.1
9.0
EPSS
99.99%
Published
Jul 14, 2021
Modified
Oct 30, 2025
CISA Known Exploited Vulnerability
Added: 2021-11-03 · Due: 2021-11-17
Apply updates per vendor instructions.
Public PoC / Exploit (3)
All weaponized →Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.
Description
Microsoft Exchange Server Elevation of Privilege Vulnerability
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:NAffected Products (5)
References (7)