CVE-2025-11743

Rockwell Automation CompactLogix® 5370 Denial of Service Vulnerability

State: Published
Severity: 7.1 High
Published: Jan 20, 2026
Updated: Jan 20, 2026
Reserved: Oct 14, 2025

Description

A denial-of-service security issue in the affected product. The security issue occurs when a malformed CIP forward open message is sent. This could result in a major nonrecoverable fault a restart is required to recover.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	Rockwell

Weaknesses

CWE-1284 Improper Validation of Specified Quantity in Input

Affected Products

Product	Versions
CompactLogix® 5370Rockwell Automation	Version 34.013 and prior, Version 35.012 and prior, Version 36.011Affected

References

https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1770.html

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