Nov 2021: Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-42321 Published on November 10, 2021
Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
Known Exploited Vulnerability
This Microsoft Exchange Server Remote Code Execution Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. An authenticated attacker could leverage improper validation in cmdlet arguments within Microsoft Exchange and perform remote code execution.
The following remediation steps are recommended / required by December 1, 2021: Apply updates per vendor instructions.
Products Associated with CVE-2021-42321
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Affected Versions
Microsoft Exchange Server 2016 Cumulative Update 21:- Version 15.01.0 and below 15.01.2308.020 is affected.
- Version 15.02.0 and below 15.02.0792.019 is affected.
- Version 15.0.0 and below 15.01.2375.017 is affected.
- Version 15.02.0 and below 15.02.0986.014 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.