Vulnerability Details CVE-2021-42321
Microsoft Exchange Server Remote Code Execution Vulnerability
Exploit prediction scoring system (EPSS) score
EPSS Score 0.935
EPSS Ranking 99.8%
CVSS Severity
CVSS v3 Score 8.8
CVSS v2 Score 6.5
Proposed Action
An authenticated attacker could leverage improper validation in cmdlet arguments within Microsoft Exchange and perform remote code execution.
Ransomware Campaign
Known
References
- http://packetstormsecurity.com/files/166153/Microsoft-Exchange-Server-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/168131/Microsoft-Exchange-Server-ChainedSerializationBinder-Remote-Code-Execution.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42321
- http://packetstormsecurity.com/files/166153/Microsoft-Exchange-Server-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/168131/Microsoft-Exchange-Server-ChainedSerializationBinder-Remote-Code-Execution.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42321
Products affected by CVE-2021-42321
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cpe:2.3:a:microsoft:exchange_server:2016
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cpe:2.3:a:microsoft:exchange_server:2019