November 3, 2021 · Applied Cybernetics Group
CVE-2021-22893 — Ivanti Pulse Connect Secure
known ransomware use
Ivanti Pulse Connect Secure Use-After-Free Vulnerability
- Added to KEV
2021-11-03- Federal due date
2022-05-03- Vendor
- Ivanti
- Product
- Pulse Connect Secure
- EPSS
- 98.8th percentile (score 0.472, as of
2026-09-16) - NVD CVSS v3.1
- 10 (CRITICAL)
- Ransomware use
- Known
- ATT&CK
- T1003 , T1059 , T1190 · signal rollup
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2021-22893
CISA short description
Ivanti Pulse Connect Secure contains a use-after-free vulnerability that allow a remote, unauthenticated attacker to execute code via license services.
Required action
Apply updates per vendor instructions.
NVD 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.