CVE-2023-21706

Microsoft Exchange Server Remote Code Execution Vulnerability

CVE-2023-21706 is fixed in 4 products on 1 platform, first by KB5023038, released February 14, 2023. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

Urgent

CVSS

8.8

Important

Exploitation

More likely

Vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0406

90th percentile

Where it's fixed

Product	Fix	Released
Microsoft
Microsoft Exchange Server 2013 Cumulative Update 23	KB5023038	Feb 14, 2023
Microsoft Exchange Server 2016 Cumulative Update 23	KB5023038	Feb 14, 2023
Microsoft Exchange Server 2019 Cumulative Update 11	KB5023038	Feb 14, 2023
Microsoft Exchange Server 2019 Cumulative Update 12	KB5023038	Feb 14, 2023

Details

Published
February 14, 2023
Weakness
Deserialization of Untrusted Data
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21706

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/cve/CVE-2023-21706">CVE-2023-21706 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Is this on your machines?

Patchblox finds every install below the fixed version on Windows, macOS and Linux, and updates them through your release rings.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.