CVE-2019-18259
CVE-2019-18259 is a critical-severity vulnerability in Omron Plc Cj Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-290.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 2% (80th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-290
- Affected product: Omron Plc Cj Firmware
- Published:
- Last modified:
Description
In Omron PLC CJ series, all versions and Omron PLC CS series, all versions, an attacker could spoof arbitrary messages or execute commands.
Frequently asked questions
- What is CVE-2019-18259?
- In Omron PLC CJ series, all versions and Omron PLC CS series, all versions, an attacker could spoof arbitrary messages or execute commands.
- How severe is CVE-2019-18259?
- CVE-2019-18259 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2019-18259 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-18259?
- CVE-2019-18259 primarily affects Omron Plc Cj Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2019-18259?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2019-18259 published?
- CVE-2019-18259 was published on 2019-12-16 and last updated on 2026-06-17.
References
Affected products (2)
- cpe:2.3:o:omron:plc_cj_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:omron:plc_cs_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Omron Plc Cj Firmware
- CVE-2019-18269 — Critical (CVSS 9.8): Omron’s CS and CJ series PLCs have an unrestricted externally accessible lock vulnerability.
- CVE-2019-18261 — Critical (CVSS 9.8): In Omron PLC CS series, all versions, Omron PLC CJ series, all versions, and Omron PLC NJ series, all versions, the…
- CVE-2019-13533 — High (CVSS 8.1): In Omron PLC CJ series, all versions, and Omron PLC CS series, all versions, an attacker could monitor traffic between…
All CVEs affecting Omron Plc Cj Firmware →
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