{"schema":"threatline.record/2","record":{"id":"CVE-2021-22681","aliases":[],"summary":"Rockwell Multiple Products Insufficient Protected Credentials Vulnerability","details":"Multiple Rockwell products contain an insufficient protected credentials vulnerability. Studio 5000 Logix Designer software may allow a key to be discovered. This key is used to verify Logix controllers are communicating with Rockwell Automation design software. If successfully exploited, this vulnerability could allow an unauthorized application to connect with Logix controllers. To leverage this vulnerability, an unauthorized user would require network access to the controller.","categories":["Industrial & IoT"],"product":"Multiple Products","vendor":"Rockwell","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-22681","source_modified_at":"2026-03-06T05:01:20.925Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllers","vendor":"n/a","versions":[{"status":"affected","version":"RSLogix 5000 Versions 16 through 20"},{"status":"affected","version":"Studio 5000 Logix Designer: Versions 21 and later"},{"status":"affected","version":"CompactLogix 1768, 1769, 5370, 5380, 5480"},{"status":"affected","version":"ControlLogix 5550, 5560, 5570, 5580"},{"status":"affected","version":"DriveLogix 5560, 5730, 1794-L34"},{"status":"affected","version":"Compact GuardLogix 5370, 5380"},{"status":"affected","version":"GuardLogix 5570, 5580"},{"status":"affected","version":"SoftLogix 5800"}],"defaultStatus":null}],"fixed_versions":[],"cvss":9.8,"severity":"Critical","kev":{"listed":true,"date_added":"2026-03-05","due_date":"2026-03-26","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.6363,"percentile":0.99218,"score_date":"2026-10-23"},"published_at":"2021-03-03T17:59:43.000Z","modified_at":"2026-03-06T05:01:20.925Z","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-2021-22681","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-03-06T05:01:20.925Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-22681","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"url":"https://support.rockwellautomation.com/app/answers/answer_view/a_id/1130301/~/cve-2021-22681%3A-authentication-bypass-vulnerability-found-in-logix-controllers-","source":"CISA KEV"},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-21-056-03","source":"CISA KEV"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22681","source":"CISA KEV"},{"source":"CVE List","url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-056-03","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22681","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":"2026-03-05T00:00:00+00:00"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"vendor and product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-03-06T05:01:20.925Z","content_hash":"fbbb5939b2817051cbc0313fabb3dba492a428dba54ac9bb1224a4d722c43c00"}}