CVE-2019-18269

CVE-2019-18269 is a critical vulnerability published on December 16, 2019. Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability.

CVE-2019-18269 was first published in the National Vulnerability Database on December 16, 2019, with the most recent update on February 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

CVE-2019-18269 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 42.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

CVE-2019-18269 has a CVSS v3 base score of 9.8 (NVD).

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-18269, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.