CVE-2019-18269

Name: CVE-2019-18269
Creator: NVD / NIST
Published: 2019-12-16T20:15:15.773+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.02%

Last modified Jun 17, 2026

CVE-2019-18269 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability.. EPSS estimates a 1.02% chance of exploitation in the next 30 days.

Description

Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.02%

59.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-412

Affected Software

Vendor	Product	Versions
Omron	Plc Cj Firmware	All versions
Omron	Plc Cs Firmware	All versions

References

https://www.omron-cxone.com/security/2019-12-06_PLC_EN.pdf
https://www.us-cert.gov/ics/advisories/icsa-19-346-02Third Party Advisory, US Government Resource
https://www.omron-cxone.com/security/2019-12-06_PLC_EN.pdf
https://www.us-cert.gov/ics/advisories/icsa-19-346-02Third Party Advisory, US Government Resource

Timeline

Published: Dec 16, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-18269?

Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability.

How severe is CVE-2019-18269?

CVE-2019-18269 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.02% probability of exploitation in the next 30 days.

How do I fix CVE-2019-18269?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-18269?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST