CVE-2026-9307 Rockwell Automation CompactLogix 5370 Controllers – Multiple Vulnerabilities
Unauthenticated attackers can view CIP Connection IDs on the web server, enabling the construction of malicious packets that cause Denial-of-Service.
- 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-2026-9307?
CVE-2026-9307 is a medium-severity vulnerability in Rockwell Automation CompactLogix 5370, published on 16 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A sensitive information disclosure security issue exists within the affected CompactLogix controllers. The controller's web server exposes CIP Connection IDs on the diagnostics webpage, which are accessible to any unauthenticated user on the network. This information can be leveraged by an attacker to construct malicious packets, leading to Denial-of-Service.
Weakness: CWE-497
Which versions are affected by CVE-2026-9307?
How do I fix CVE-2026-9307?
No fix has been published for CVE-2026-9307 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-9307 being exploited?
There is no known exploitation of CVE-2026-9307 in the wild and no public exploit code.
Sources
Also known as GHSA-gpr8-p742-hw62.