What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2021-11-03
• EPSS: 47.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-23 · updated 2026-08-12
• Weakness: CWE-287

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.

Affected products

• Ivanti Connect Secure (Pulse Secure): 9.0, 9.0-r1, 9.0-r2, 9.0-r2.1, 9.0-r3, 9.0-r3.1 (+30)

References

• https://blog.pulsesecure.net/pulse-connect-secure-security-update/
• https://kb.cert.org/vuls/id/213092
• https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/
• https://www.fireeye.com/blog/threat-research/2021/04/suspected-apt-actors-leverage-bypass-techniques-pulse-secure-zero-day.html
• https://blog.pulsesecure.net/pulse-connect-secure-security-update/
• https://kb.cert.org/vuls/id/213092
• https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/
• https://www.fireeye.com/blog/threat-research/2021/04/suspected-apt-actors-leverage-bypass-techniques-pulse-secure-zero-day.html
• https://www.kb.cert.org/vuls/id/213092
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22893

Get alerted when CVE-2021-22893 or the next vulnerability affects your stack