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CVE-2021-22893: Ivanti Pulse Connect Secure Use-After-Free Vulnerability

criticalknown exploitedpublic exploitCVE-2021-22893
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 contains a use-after-free vulnerability that allow a remote, unauthenticated attacker to execute code via license services.

CSIRTS triage

vendor: Ivantiproduct: Pulse Connect SecureRemote code execution
What
Ivanti Pulse Connect Secure has a use-after-free vulnerability that allows remote code execution.
Who is affected
Users of Ivanti Pulse Connect Secure.
Urgency
Remediation is urgent as the vulnerability is actively exploited and critical in severity.
Action
Apply the latest patches from Ivanti.

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-2021-22893

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-2021-22893coverage & 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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