CVE-2020-6986

HIGH

Omron PLC CJ Series - Denial of Service via Ethernet Packet Flood

Title source: llm

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.

References (1)

Core 1

Core References

Mitigation, Third Party Advisory, US Government Resource x_refsource_misc

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

Scores

CVSS v3 7.5

EPSS 0.0151

EPSS Percentile 71.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-400

Status published

Products (3)

None/Omron PLC CJ Series all versions

omron/plc_cj1_firmware

omron/plc_cj2_firmware

Published Mar 05, 2020

Tracked Since Feb 18, 2026