CVE-2026-44107 Exposed Reboot via Modbus
Unauthenticated attackers can trigger a reboot via Modbus TCP, causing denial of service on Phoenix Contact charging controllers.
- 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-2026-44107?
CVE-2026-44107 is a high-severity missing authorization 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
A reboot of the charging controller can be triggered via Modbus TCP without authentication. Therefore, when the Modbus functionality is enabled by opening the port that CharxModbusServer is listening, an unauthenticated attacker can perform a Denial-of-Service attack.
Weakness: CWE-749
Which versions are affected by CVE-2026-44107?
How do I fix CVE-2026-44107?
No fix has been published for CVE-2026-44107 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-2026-44107 being exploited?
There is no known exploitation of CVE-2026-44107 in the wild and no public exploit code.
Sources
Also known as GHSA-84gq-hw46-3cvp.