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CVE-2021-22894: Ivanti Pulse Connect Secure Collaboration Suite Buffer Overflow Vulnerability

criticalknown exploitedCVE-2021-22894
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Ivantiproduct: Pulse Connect Secure Collaboration Suite
What
Ivanti Pulse Connect Secure Collaboration Suite contains a buffer overflow vulnerability that allows remote authenticated users to execute code as the root user via maliciously crafted meeting room.
Who is affected
Authenticated users of Ivanti Pulse Connect Secure Collaboration Suite are affected.
Urgency
Remediation is urgent due to the critical nature of the vulnerability and its exploitation status.
Action
Users should update to the latest version of Pulse Connect Secure.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-22894

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2021-22894coverage & exploitation statusNVD · CVE.org

Recent advisories for Ivanti Pulse Connect

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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