CVE-2019-18269: omron omron plc cj series Unrestricted Externally Accessible Lock
Modified
Published 16-12-2019Last modified 02-06-2026
Vulnerability summary
CVE-2019-18269 is a critical (CVSS 9.8) Unrestricted Externally Accessible Lock vulnerability in omron omron plc cj series. EPSS estimates a 1.05% chance of exploitation in the next 30 days, higher than 63.9% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
1.05%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded
Timeline
- 16-12-2019PublishedVulnerability first disclosed.
- 02-06-2026Last modifiedVulnerability information updated.
Description
Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability.
CVSS metrics
3 scores · 2 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSources2 sources · 8.6–9.8
- CVE.orgCNA8.6HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:HDiffers
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.05%
Chance of exploitation in the next 30 days
Percentile
64%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.05% on 22-09-2026
22-09-202622-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Omron3 products
- omron plc cj seriesAll versions (No fix recorded)
- omron plc cs seriesAll versions (No fix recorded)
- omron plc nx1p2 seriesAll versions (No fix recorded)
1 vendor · 3 products
References
2 links- www.us-cert.gov/ics/advisories/icsa-19-346-02X Refsource MISCThird Party AdvisoryUS Government Resource