CVE-2026-19472 Rockwell Automation ArmorStart® LT Denial Of Service
An attacker can cause a denial of service on Rockwell ArmorStart LT devices by sending a crafted HTTP PUT request to the embedded web server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19472?
CVE-2026-19472 is a high-severity denial of service vulnerability in Rockwell Automation ArmorStart® LT, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A denial-of-service security issue exists within ArmorStart® LT. The security issue stems from improper handling of a crafted HTTP PUT request sent to the embedded web server. This can result in a loss of web server availability
Weakness: CWE-770
Which versions are affected by CVE-2026-19472?
How do I fix CVE-2026-19472?
No fix has been published for CVE-2026-19472 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-2026-19472 being exploited?
There is no known exploitation of CVE-2026-19472 in the wild and no public exploit code.
Sources
Also known as GHSA-mh24-4rcj-4gmj.