CVE-2026-12663 ControlFLASH ® – Improper Access Control
Improper access control in ControlFLASH installer allows arbitrary code execution via write permissions granted to the Everyone group.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-12663?
CVE-2026-12663 is a high-severity missing authorization vulnerability in Rockwell Automation ControlFLASH ®, published on 1 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A security issue exists within ControlFLASH™, where the installer grants write permissions to the "Everyone" group on a product installation directory. This could allow arbitrary code execution, resulting in an attacker being given the ability to run any commands or code of the attacker's choice on a target machine at the logged-in user's permission level.
Weakness: CWE-306
Which versions are affected by CVE-2026-12663?
How do I fix CVE-2026-12663?
No fix has been published for CVE-2026-12663 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-12663 being exploited?
There is no known exploitation of CVE-2026-12663 in the wild and no public exploit code.
Sources
Also known as GHSA-vcp2-c9vw-q6x9.