CVE-2025-13823: Rockwell Automation MICRO820, MICRO850, MICRO870

High severity, CVSS 7.1. EPSS: 0.2% chance of exploitation in the next 30 days.

A security issue was found in the IPv6 stack in the Micro850 and Micro870 controllers when the controllers received multiple malformed packets during fuzzing. The controllers will go into recoverable fault with fault code 0xFE60. To recover the controller, clear the fault.

Affected products

Published 2025-12-15. Last modified 2026-10-07.