Unrated severityCISA KEVNVD Advisory· Published Nov 10, 2021· Updated Oct 21, 2025
Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-42321
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Affected products
4cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*+ 3 more
- cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*range: 15.01.0
- cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:*range: 15.0.0
- cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*range: 15.02.0
- cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:*range: 15.02.0
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
3- packetstormsecurity.com/files/166153/Microsoft-Exchange-Server-Remote-Code-Execution.htmlmitrex_refsource_MISC
- packetstormsecurity.com/files/168131/Microsoft-Exchange-Server-ChainedSerializationBinder-Remote-Code-Execution.htmlmitrex_refsource_MISC
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42321mitrex_refsource_MISC
News mentions
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