Exploited vulnerability · CISA KEV
Yes. CVE-2024-21410, Microsoft Exchange Server Privilege Escalation Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 15 Feb 2024, 2 days after it was published. It affects Microsoft Exchange Server. If you run it, CISA's required action is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Microsoft Exchange Server contains an unspecified vulnerability that allows for privilege escalation.
| Vendor | Microsoft (391 exploited CVEs in KEV) |
| Product | Exchange Server |
| Vulnerability | Microsoft Exchange Server Privilege Escalation Vulnerability |
| Weakness | CWE-287 |
| Published | 13 Feb 2024 |
| Added to KEV | 15 Feb 2024 |
| Reported by (CNA) | microsoft |
Yes. CISA added CVE-2024-21410 to the Known Exploited Vulnerabilities catalog on 15 Feb 2024, which means there is reliable evidence of exploitation in the wild.
CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check Microsoft's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Exchange Server and watch it for signs of compromise.
Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in February 2024 · Microsoft scorecard · act-now radar.
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