CVE-2026-44091 Creation of a new configuration by posting a malicious ID to MQTT
Unauthenticated attackers can create malicious configuration entries via MQTT, compromising integrity and availability of Phoenix Contact security 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-2026-44091?
CVE-2026-44091 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
An unauthenticated remote attacker can post a malicious ID to the MQTT Broker results in the creation of a new configuration entry in the system configuration. This may lead to integrity and availability loss.
Weakness: CWE-501
Which versions are affected by CVE-2026-44091?
How do I fix CVE-2026-44091?
No fix has been published for CVE-2026-44091 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-2026-44091 being exploited?
There is no known exploitation of CVE-2026-44091 in the wild and no public exploit code.
Sources
Also known as GHSA-pwf7-5xmc-7x99.