CVE-2026-7849 Command Injection in SCM (idledisconnect parameter)
Unauthenticated remote attackers can inject commands into the system configuration, leading to root-level code execution on Phoenix Contact CHARX SEC devices.
- 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-2026-7849?
CVE-2026-7849 is a critical command injection vulnerability in Phoenix Contact CHARX SEC-3000, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Due to improper neutralization of special elements, an unauthenticated remote attacker is able to inject a command into the system configuration which is subsequently executed as root.
Weakness: CWE-77
Which versions are affected by CVE-2026-7849?
How do I fix CVE-2026-7849?
No fix has been published for CVE-2026-7849 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-7849 being exploited?
There is no known exploitation of CVE-2026-7849 in the wild and no public exploit code.
Sources
Also known as GHSA-4mmh-4692-xw3f.