CVE-2021-22893
Ivanti Pulse Connect Secure Use-After-Free Vulnerability
- Critical 10.0
- Exploited: added to CISA KEV 3 Nov 2021
- Used in ransomware campaigns
Description
Pulse Connect Secure 9.0R3/9.1R1 and higher is vulnerable to an authentication bypass vulnerability exposed by the Windows File Share Browser and Pulse Secure Collaboration features of Pulse Connect Secure that can allow an unauthenticated user to perform remote arbitrary code execution on the Pulse Connect Secure gateway. This vulnerability has been exploited in the wild.
Key facts
- Published
- 23 Apr 2021
- Last changed
- 12 Aug 2026
- Assigned by
- hackerone
- KEV added
- 3 Nov 2021
- KEV fix due
- 3 May 2022
- Used in ransomware
- Yes, according to CISA
- EPSS
- 47.508% likely to be exploited in the next 30 days, higher than 98.864% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 10.0CVSS 3.1, Criticalfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | Pulse Connect Secure |
|
Timeline
- 23 Apr 2021 Published
- 3 Nov 2021 CVE-2021-22893 added to CISA KEV
- 3 Nov 2021 Added to the CISA KEV catalogue