CVE-2026-9634 Redundancy Module Configuration Tool - Multiple Vulnerabilities
Local attackers can escalate privileges to Administrator by placing a malicious DLL in a writable directory loaded by the Redundancy Module Configuration Tool.
- 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-2026-9634?
CVE-2026-9634 is a high-severity vulnerability in Rockwell Automation Redundancy Module Configuration Tool, 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 the Redundancy Module Configuration Tool. The RMConfigTool.exe binary searches directories in the system path for a required DLL, and one or more of these directories may be writable by standard (non-administrator) users due to incorrect default permissions. If a local attacker places a malicious DLL in such a directory and an administrator subsequently runs the tool, the malicious DLL is loaded into the elevated process and executes with Administrator/SYSTEM privileges.
Weakness: CWE-276
Which versions are affected by CVE-2026-9634?
How do I fix CVE-2026-9634?
No fix has been published for CVE-2026-9634 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-9634 being exploited?
There is no known exploitation of CVE-2026-9634 in the wild and no public exploit code.
Sources
Also known as GHSA-m4x4-q92v-4gp7.