CVE-2021-22893 · Severity: critical · CVSS 10 · Exploited in the wild · Published 2021-11-03
Ivanti Pulse Connect Secure contains a use-after-free and authentication bypass vulnerability in the Windows File Share Browser and Pulse Secure Collaboration features. A remote, unauthenticated attacker can exploit this to execute arbitrary code on the gateway. This vulnerability has been observed being exploited in the wild.
Quick answers
Is CVE-2021-22893 exploited in the wild?
Yes. CVE-2021-22893 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2021-22893?
Critical severity, with a CVSS score of 10, published 3 November 2021.
Which products and versions are affected?
Ivanti Pulse Connect Secure 9.0R3 and higher; 9.1R1 and higher.
Is there a fix for CVE-2021-22893?
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-2021-22893 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2021-22893?
Check whether anything you run is named in the advisory. 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
Ivanti Pulse Connect Secure 9.0R3 and higher; 9.1R1 and higher
Timeline
2021-04-20: disclosed: Initial discovery/reporting of zero-day exploitation by FireEye/Mandiant
2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog