CVE-2024-21410: Microsoft Exchange Server Privilege Escalation Vulnerability
CVE-2024-21410 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2024-02-15
Microsoft Exchange Server contains an elevation of privilege vulnerability due to improper authentication. The flaw allows a remote, unauthenticated attacker to escalate privileges on the system. This vulnerability has been confirmed to be exploited in the wild.
Yes. CVE-2024-21410 is known to be exploited in the wild, first recorded on 15 February 2024. Treat it as urgent.
How severe is CVE-2024-21410?
Critical severity, with a CVSS score of 9.8, published 15 February 2024.
Which products and versions are affected?
Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 13; Microsoft Exchange Server 2019 Cumulative Update 14.
Is there a fix for CVE-2024-21410?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2024-21410 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2024-21410?
Check whether you run Microsoft Exchange Server. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Microsoft Exchange Server 2016 Cumulative Update 23
Microsoft Exchange Server 2019 Cumulative Update 13
Microsoft Exchange Server 2019 Cumulative Update 14
Timeline
2024-02-13: disclosed: Initial disclosure by Microsoft Corporation
2024-02-15: kev added: Added to CISA's Known Exploited Vulnerabilities Catalog
2024-03-07: other: CISA due date for required mitigation action