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High severity7.5NVD Advisory· Published Mar 5, 2020· Updated Jun 17, 2026

CVE-2020-6986

CVE-2020-6986

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.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

4
  • Omron/Plc Cj Firmware2 versions
    cpe:2.3:o:omron:plc_cj1_firmware:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:omron:plc_cj1_firmware:*:*:*:*:*:*:*:*
    • cpe:2.3:o:omron:plc_cj2_firmware:*:*:*:*:*:*:*:*
  • Omron/PLC CJ Seriesdescription
  • Omron/CJ-series PLCsllm-fuzzy

Patches

Vulnerability mechanics

References

1

News mentions

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