CVE-2026-9140 1718-AENTR/1719-AENTR - Denial of Service
A UDP unicast network storm causes the 1719-AENTR device to overload and lose communication, requiring a power cycle to recover.
- 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-2026-9140?
CVE-2026-9140 is a high-severity denial of service vulnerability in Rockwell Automation 1718-AENTR/1719-AENTR, published on 14 Jul 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 in the 1719-AENTR. The security issue stems from improper handling of a UDP unicast network storm, which causes the device to become overloaded and lose communication. A power cycle is required to recover.
Weakness: CWE-770
Which versions are affected by CVE-2026-9140?
How do I fix CVE-2026-9140?
No fix has been published for CVE-2026-9140 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-2026-9140 being exploited?
There is no known exploitation of CVE-2026-9140 in the wild and no public exploit code.
Sources
Also known as GHSA-59qg-236r-79mg.