# CVE-2021-22893: Ivanti Pulse Connect Secure Use-After-Free Vulnerability

Source: https://junglewise.ai/threats/cve-2021-22893-ivanti-pulse-connect-secure-use-after-free-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-11-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

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
- 2021-11-03: advisory: NVD publication date