What’s Vulnerable › Vulnerabilities

CVE-2020-6986

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-03-05 · updated 2026-06-17
• Weakness: CWE-400

Description

In all versions of Omron PLC CJ Series, an attacker can send a series of specific data packets within a short period, causing a service error on the PLC Ethernet module, which in turn causes a PLC service denied result.

Affected products

• Omron Plc Cj1 Firmware: all versions
• Omron Plc Cj2 Firmware: all versions

References

• https://www.us-cert.gov/ics/advisories/icsa-20-063-03
• https://www.us-cert.gov/ics/advisories/icsa-20-063-03

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