CVE-2021-24085

Name: CVE-2021-24085
Creator: NVD / NIST
Published: 2021-02-25T23:15:15.243+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 4.63%

Last modified Jun 17, 2026

CVE-2021-24085 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Microsoft Exchange Server Spoofing Vulnerability. EPSS estimates a 4.63% chance of exploitation in the next 30 days.

Description

Microsoft Exchange Server Spoofing Vulnerability

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

EPSS Probability

4.63%

90.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions	Update
Microsoft	Exchange Server	2016	Cumulative Update 18
Microsoft	Exchange Server	2019	Cumulative Update 7

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-24085Patch, Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-24085Patch, Vendor Advisory

Timeline

Published: Feb 25, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24085?

Microsoft Exchange Server Spoofing Vulnerability

How severe is CVE-2021-24085?

CVE-2021-24085 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 4.63% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24085?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-24085?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST