CVE Database · CVE-2021-26858
CVSS v3.1
7.8
EPSS
89.51%
Published
Mar 2, 2021
Modified
Dec 17, 2025
CISA Known Exploited Vulnerability
Added: 2021-11-03 · Due: 2022-05-03
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 Remote Code Execution Vulnerability
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HAffected Products (25)
References (3)