CVE-2019-18269
In Omron PLC CJ series, all versions, and Omron PLC CS series, all versions, the software...
Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability.
- Record
CVE-2019-18269- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-412
- Updated
- 2026-11-02
CVE List
Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability.
- Record
CVE-2019-18269- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Weakness
- CWE-412
- Updated
- 2026-11-02
EUVDEUVD-2019-8061
Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability.
- Record
EUVD-2019-8061- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-5xrh-m4jr-pgwp
In Omron PLC CJ series, all versions, and Omron PLC CS series, all versions, the software...
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.
- Record
GHSA-5xrh-m4jr-pgwp- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-412
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-18269 is a critical vulnerability (CVSS 9.8) in Omron Plc Cj Series, published December 16, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.04%, the 64th percentile. No source names a fixed version.