CVE Database · CVE-2021-31207
CVSS v3.1
6.6
EPSS
99.78%
Published
May 11, 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 (1)
All weaponized →Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.
Description
Microsoft Exchange Server Security Feature Bypass Vulnerability
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:HWeaknesses (CWE)
Affected Products (5)
References (7)