{"schema":"threatline.record/2","record":{"id":"CVE-2021-22893","aliases":[],"summary":"Ivanti Pulse Connect Secure Use-After-Free Vulnerability","details":"Ivanti Pulse Connect Secure contains a use-after-free vulnerability that allow a remote, unauthenticated attacker to execute code via license services.","categories":["Identity & access"],"product":"Pulse Connect Secure","vendor":"Ivanti","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-22893","source_modified_at":"2026-08-12T03:55:19.358Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Pulse Connect Secure","vendor":"n/a","versions":[{"status":"affected","version":"PCS 9.0R3 or above, PCS 9.1R1 and above"}],"defaultStatus":null}],"fixed_versions":[],"cvss":10,"severity":"Critical","kev":{"listed":true,"date_added":"2021-11-03","due_date":"2022-05-03","required_action":"Apply updates per vendor instructions.","ransomware_campaign_use":"Known"},"epss":{"probability":0.47172,"percentile":0.98835,"score_date":"2026-10-23"},"published_at":"2021-04-23T16:29:43.000Z","modified_at":"2026-08-12T03:55:19.358Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2021-22893","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-08-12T03:55:19.358Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-22893","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://blog.pulsesecure.net/pulse-connect-secure-security-update/","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","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"]},{"source":"CVE List","url":"https://kb.cert.org/vuls/id/213092","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://www.kb.cert.org/vuls/id/213092"},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22893","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"total","assessed_at":"2021-04-20T00:00:00+00:00"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-08-12T03:55:19.358Z","content_hash":"43cbe3c8ec43304f65622619b51dea664ef95f0772398a02609352bcc481bd32"}}