SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-24085

Microsoft Exchange Server Spoofing Vulnerability

MEDIUM 6.5EPSS 4.63%

Does this matter?

Lower severity and a low EPSS score (4.63%). Track it; it rarely justifies an emergency change on its own.

Description

Microsoft Exchange Server Spoofing Vulnerability

CVSS 3.1
6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
EPSS
4.63% probability · 92th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Affected
microsoft/exchange server
Source
secure@microsoft.com
EPSS trend
0%3%5%26 October 2026: 4.63%26 October 202626 October 2026

EPSS 4.6% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.