CVE-2021-42321 — Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-42321: Microsoft Exchange Server Remote Code Execution Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Microsoft |
| Product | Exchange |
| Date added | 2021-11-17 |
| Due date | 2021-12-01 |
| Ransomware campaign use | Known |
Description
An authenticated attacker could leverage improper validation in cmdlet arguments within Microsoft Exchange and perform remote code execution.
Required action (CISA)
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-42321
Weakness behind it
CISA records this vulnerability as an instance of CWE-184, CWE-502. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-42321
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
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