{"id":"CVE-2021-22893","aliases":["EUVD-2021-10025","GHSA-hcxw-prp6-q3jq"],"status":"published","title":"Pulse Connect Secure 9.0R3/9.1R1 and higher is vulnerable to an authentication bypass...","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.","severity":{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.47508,"percentile":0.98851,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-287","CWE-416"],"published":"2021-04-23T16:29:43Z","modified":"2026-08-12T05:17:37Z","kev":{"date_added":"2021-11-03","due_date":"2022-05-03","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Known"},"exploitation":[{"source":"euvd","since":"2021-11-03"},{"source":"kev","since":"2021-11-03"}],"exploits":[{"source":"pocgithub","id":"MRLEE123456/CVE-2021-22893","title":"MRLEE123456/CVE-2021-22893","date":"2021-04-21","url":"https://github.com/MRLEE123456/CVE-2021-22893"},{"source":"pocgithub","id":"ZephrFish/CVE-2021-22893_HoneyPoC2","title":"ZephrFish/CVE-2021-22893_HoneyPoC2","date":"2021-04-21","url":"https://github.com/ZephrFish/CVE-2021-22893_HoneyPoC2"},{"source":"pocgithub","id":"orangmuda/CVE-2021-22893","title":"orangmuda/CVE-2021-22893","date":"2021-10-03","url":"https://github.com/orangmuda/CVE-2021-22893"}],"products":[{"vendor":"ivanti","product":"connect_secure"},{"vendor":"ivanti","product":"pulse connect secure"}],"references":[{"url":"https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/","tags":["x_refsource_MISC","x_transferred","Broken Link","Vendor Advisory"]},{"url":"https://blog.pulsesecure.net/pulse-connect-secure-security-update/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://www.fireeye.com/blog/threat-research/2021/04/suspected-apt-actors-leverage-bypass-techniques-pulse-secure-zero-day.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://kb.cert.org/vuls/id/213092","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://www.kb.cert.org/vuls/id/213092","tags":["US Government Resource"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22893","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22893"},{"url":"https://blog.pulsesecure.net/pulse-connect-secure-security-update"},{"url":"https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784"},{"url":"https://github.com/advisories/GHSA-hcxw-prp6-q3jq"}],"sources":{"cve":[{"id":"CVE-2021-22893","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.","status":"published","published":"2021-04-23T16:29:43Z","modified":"2026-08-12T03:55:19.358Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:32:57.701381Z"}],"euvd":[{"id":"EUVD-2021-10025","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.","status":"published","published":"2021-04-23T16:29:43Z","modified":"2026-08-12T03:55:19Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"exploited_since":"2021-11-03","updated_at":"2026-11-02T18:01:59.11112Z"}],"ghsa":[{"id":"GHSA-hcxw-prp6-q3jq","title":"Pulse Connect Secure 9.0R3/9.1R1 and higher is vulnerable to an authentication bypass...","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.","status":"published","published":"2022-05-24T17:48:22Z","modified":"2025-10-22T00:33:09Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-287","CWE-416"],"updated_at":"2026-11-02T15:04:07.67458Z"}],"kev":[{"id":"CVE-2021-22893","title":"Ivanti Pulse Connect Secure Use-After-Free Vulnerability","description":"Ivanti Pulse Connect Secure contains a use-after-free vulnerability that allow a remote, unauthenticated attacker to execute code via license services.","cwes":["CWE-287"],"kev":{"date_added":"2021-11-03","due_date":"2022-05-03","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Known"},"updated_at":"2026-11-02T17:00:17.050017Z"}],"nvd":[{"id":"CVE-2021-22893","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.","status":"published","published":"2021-04-23T17:15:08.127Z","modified":"2026-08-12T05:17:37.347Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-287","CWE-416"],"updated_at":"2026-11-02T14:06:52.03307Z"}]}}