{"id":"CVE-2019-18269","state":"PUBLISHED","title":"Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability.","description":"Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability.","publishedAt":"2019-12-16T19:21:31.000Z","updatedAt":"2026-06-02T19:50:28.415Z","severity":{"score":8.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","source":"CISA-ADP"},"assigner":"icscert","products":["Omron Omron PLC CJ Series","Omron Omron PLC CS series","Omron Omron PLC NX1P2 series"],"affected":[{"vendor":"Omron","product":"Omron PLC CJ Series","defaultStatus":"unaffected","versions":[{"version":"all versions","status":"affected"}]},{"vendor":"Omron","product":"Omron PLC CS series","defaultStatus":"unaffected","versions":[{"version":"all versions","status":"affected"}]},{"vendor":"Omron","product":"Omron PLC NX1P2 series","defaultStatus":"unaffected","versions":[{"version":"all versions","status":"affected"}]}],"references":["https://www.us-cert.gov/ics/advisories/icsa-19-346-02","https://www.omron-cxone.com/security/2019-12-06_PLC_EN.pdf"],"weaknesses":["CWE-412"],"ingestedAt":"2026-10-29T19:45:41.458Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2019/18xxx/CVE-2019-18269.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2019-18269","state":"PUBLISHED","datePublished":"2019-12-16T19:21:31.000Z","dateUpdated":"2026-06-02T19:50:28.415Z","assignerShortName":"icscert","assignerOrgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","dateReserved":"2019-10-22T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability."}],"affected":[{"vendor":"Omron","product":"Omron PLC CJ Series","defaultStatus":"unaffected","versions":[{"version":"all versions","status":"affected"}]},{"vendor":"Omron","product":"Omron PLC CS series","defaultStatus":"unaffected","versions":[{"version":"all versions","status":"affected"}]},{"vendor":"Omron","product":"Omron PLC NX1P2 series","defaultStatus":"unaffected","versions":[{"version":"all versions","status":"affected"}]}],"references":[{"url":"https://www.us-cert.gov/ics/advisories/icsa-19-346-02","tags":["x_refsource_MISC"]},{"url":"https://www.omron-cxone.com/security/2019-12-06_PLC_EN.pdf"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-412","description":"CWE-412 Unrestricted Externally Accessible Lock","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"icscert","orgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","dateUpdated":"2023-04-27T22:40:45.810Z"},"credits":[{"lang":"en","type":"finder","user":"00000000-0000-4000-9000-000000000000","value":"Jipeng You (XDU) and n0b0dy reported these vulnerabilities to CISA."}],"source":{"discovery":"EXTERNAL"},"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"

Omron recommends the following mitigation measures:

For more information provided by Omron on these vulnerabilities refer to Vulnerabilities in Omron CS and CJ series CPU PLCs.

\n\n
"}],"value":"Omron recommends the following mitigation measures:\n\n * Filter FINS port: Protect access to Omron’s PLC with a firewall and blocking unnecessary remote access to FINS port (default: 9600).\n * Filter IP addresses: Protect access to Omron’s PLC with a firewall and filtering devices connected to the PLC by IP address.\n\n\nFor more information provided by Omron on these vulnerabilities refer to Vulnerabilities in Omron CS and CJ series CPU PLCs https://gcc01.safelinks.protection.outlook.com/ ."}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"ics-cert@hq.dhs.gov","ID":"CVE-2019-18269","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Omron PLC CJ and CS Series","version":{"version_data":[{"version_value":"Omron PLC CJ series, all versions, Omron PLC CS series, all versions"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"In Omron PLC CJ series, all versions, and Omron PLC CS series, all versions, the software properly checks for the existence of a lock, but the lock can be externally controlled or influenced by an actor that is outside of the intended sphere of control."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"UNRESTRICTED EXTERNALLY ACCESSIBLE LOCK CWE-412"}]}]},"references":{"reference_data":[{"name":"https://www.us-cert.gov/ics/advisories/icsa-19-346-02","refsource":"MISC","url":"https://www.us-cert.gov/ics/advisories/icsa-19-346-02"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://www.us-cert.gov/ics/advisories/icsa-19-346-02","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://www.omron-cxone.com/security/2019-12-06_PLC_EN.pdf","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-05T01:47:14.075Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":8.6,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","integrityImpact":"LOW","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-06-02T19:50:04.104058Z","id":"CVE-2019-18269","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-02T19:50:28.415Z"}}]}}}