CVE-2021-22893
Published: November 3, 2021
Official Description
Ivanti Pulse Connect Secure contains a use-after-free vulnerability that allow a remote, unauthenticated attacker to execute code via license services.
CISA KEV Advisory
Ivanti Pulse Connect Secure Use-After-Free Vulnerability
Ivanti Pulse Connect Secure contains a use-after-free vulnerability that allow a remote, unauthenticated attacker to execute code via license services.
Apply updates per vendor instructions.
Risk Analysis
This Ivanti Pulse Connect Secure vulnerability is a use-after-free flaw that allows a remote, unauthenticated attacker to execute code through license services. Its high EPSS score of 0.93607 and inclusion in CISA's KEV indicate a very high likelihood of active exploitation and significant risk.
Active exploitation of this vulnerability has been observed in the wild. The flaw is remotely exploitable by an unauthenticated attacker.
Apply the latest security patches and updates for Ivanti Pulse Connect Secure. Ensure that license services are properly secured and not exposed unnecessarily.
Technical Analysis
CVE-2021-22893 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2021-22893 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-22893 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1