CVE-2026-12655 1732E ArmorBlock® - Multiple Vulnerabilities
Unauthenticated attackers can change the webserver password, leading to admin account takeover and unauthorized configuration changes on the device.
- 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-2026-12655?
CVE-2026-12655 is a high-severity authentication bypass vulnerability in Rockwell Automation 1732E ArmorBlock® I/O, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security issue exists within 1732E ArmorBlock® I/O, where an unauthenticated attacker can change the device's webserver password without valid credentials. This could result in admin account takeover or unauthorized modification of device configuration.
Weakness: CWE-294
Which versions are affected by CVE-2026-12655?
How do I fix CVE-2026-12655?
No fix has been published for CVE-2026-12655 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-12655 being exploited?
There is no known exploitation of CVE-2026-12655 in the wild and no public exploit code.
Sources
Also known as GHSA-2cq9-96mg-hc99.