# CVE-2021-22893

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.

- Page: https://www.vulneraibility.com/cve/CVE-2021-22893
- CVSS: 10.0
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2022-05-03; known ransomware use
- EPSS: 47.51% (percentile 98.9)
- Unvetted proof-of-concept code on GitHub: 3 GitHub proofs of concept (first 2021-04-21)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2021-04-20)
- Weakness: CWE-287
- Published: 2021-04-23

## Affected versions

- Pulse Connect Secure: affected PCS 9.0R3 or above, PCS 9.1R1 and above

A version outside these ranges is not a statement that it is unaffected.

## References

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

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.