CVE-2026-0647 Rockwell Automation FLEX I/O Dual-port EtherNet/IP Adapters – Multiple Vulnerabilities
Unauthenticated attackers can change the web interface password on Rockwell FLEX I/O adapters, leading to account takeover and loss of availability.
- 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-2026-0647?
CVE-2026-0647 is a high-severity authentication bypass vulnerability in Rockwell Automation FLEX I/O EtherNet/IP Adapters, published on 16 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An improper authentication security issue exists within the 1794-AENTR adapter's embedded web server. The vulnerability allows an unauthenticated attacker to change the device's web interface password by sending a crafted HTTP GET request to a specific endpoint, without any prior authentication being required. If exploited, this could lead to unauthorized access, account takeover, and loss of the device’s embedded web server’s availability.
Weakness: CWE-306
Which versions are affected by CVE-2026-0647?
How do I fix CVE-2026-0647?
No fix has been published for CVE-2026-0647 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-2026-0647 being exploited?
There is no known exploitation of CVE-2026-0647 in the wild and no public exploit code.
Sources
Also known as GHSA-vhq6-x73f-hjjx.