CVE-2023-21710

Name: CVE-2023-21710
Creator: NVD / NIST
Published: 2023-02-14T20:15:14.05+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 7.87%

Last modified Jun 17, 2026

CVE-2023-21710 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. Microsoft Exchange Server Remote Code Execution Vulnerability. EPSS estimates a 7.87% chance of exploitation in the next 30 days.

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

Metrics

CVSS 3.1

7.2/10

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

EPSS Probability

7.87%

94.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions	Update
Microsoft	Exchange Server	2016	Cumulative Update 23
Microsoft	Exchange Server	2019	Cumulative Update 11

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21710Patch, Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21710Patch, Vendor Advisory

Timeline

Published: Feb 14, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-21710?

Microsoft Exchange Server Remote Code Execution Vulnerability

How severe is CVE-2023-21710?

CVE-2023-21710 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 7.87% probability of exploitation in the next 30 days.

How do I fix CVE-2023-21710?

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-2023-21710?

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

Scan your code now

Source: NVD / NIST