CVE-2025-13823 Micro820®, Micro850®, Micro870® – Specialized Fuzzing Vulnerabilities
Attackers can cause Micro8 PLCs to enter a recoverable fault state by sending malformed IPv6 packets, requiring manual fault clearing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-13823?
CVE-2025-13823 is a high-severity denial of service vulnerability in Rockwell Automation Micro820®, Micro850®, Micro870®, published on 15 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-1395
Which versions are affected by CVE-2025-13823?
How do I fix CVE-2025-13823?
No fix has been published for CVE-2025-13823 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-13823 being exploited?
There is no known exploitation of CVE-2025-13823 in the wild and no public exploit code.
Sources
Also known as GHSA-wpv9-4fx9-263w.