Exploited Vulnerabilities DailyCVE-2021-42321: Microsoft Exchange
EPSS91.7%No. 435 of 1739 in KEV
CVE year2021listed the same year
Same vendor in KEV389
Same product1
| Field | Value |
|---|---|
| Vendor | Microsoft |
| Product | Exchange |
| Name | Microsoft Exchange Server Remote Code Execution Vulnerability |
| Added to KEV | 2021-11-17 |
| US federal due date | 2021-12-01 |
| Ransomware use | Known |
| CWE | CWE-184, CWE-502 |
CISA description
An authenticated attacker could leverage improper validation in cmdlet arguments within Microsoft Exchange and perform remote code execution.
Data from CISA's Known Exploited Vulnerabilities (KEV) catalog. EPSS is FIRST's estimated probability of exploitation activity in the next 30 days, refreshed weekly. Always follow the vendor's official guidance.
About this page
A Microsoft Exchange vulnerability added to CISA's Known Exploited Vulnerabilities catalog on 2021-11-17.