CVE-2021-22894
Published: November 3, 2021
Official Description
Ivanti Pulse Connect Secure Collaboration Suite contains a buffer overflow vulnerabilities that allows a remote authenticated users to execute code as the root user via maliciously crafted meeting room.
CISA KEV Advisory
Ivanti Pulse Connect Secure Collaboration Suite Buffer Overflow Vulnerability
Ivanti Pulse Connect Secure Collaboration Suite contains a buffer overflow vulnerabilities that allows a remote authenticated users to execute code as the root user via maliciously crafted meeting room.
Apply updates per vendor instructions.
Risk Analysis
This high-severity buffer overflow in Ivanti Pulse Connect Secure Collaboration Suite allows an authenticated remote user to execute code as the root user. The vulnerability is confirmed to be exploited in the wild and is listed in CISA's KEV catalog, with an EPSS score of 0.25730 indicating a high likelihood of exploitation. This poses a critical risk to affected systems.
Active exploitation of this vulnerability has been observed in the wild, and it is included in CISA's KEV catalog. The flaw is remotely exploitable, requiring prior authentication.
Apply the latest security patches and updates for Ivanti Pulse Connect Secure Collaboration Suite. Review and strengthen authentication policies and access controls for collaboration suite users.
Technical Analysis
CVE-2021-22894 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-2021-22894 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-2021-22894 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