CVE-2025-24003 MQTT OOB Write Vulnerability in EichrechtAgents of German EV Charging Stations

What is CVE-2025-24003?

CVE-2025-24003 is a high-severity memory corruption vulnerability in Phoenix Contact CHARX SEC-3000, published on 8 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An unauthenticated remote attacker can use MQTT messages to trigger out-of-bounds writes in charging stations complying with German Calibration Law, resulting in a loss of integrity for only EichrechtAgents and potential denial-of-service for these stations.

Weakness: CWE-120

Which versions are affected by CVE-2025-24003?

It affects 4 products.

Products include Phoenixcontact Charx Sec-3000 Firmware, Phoenixcontact Charx Sec-3050 Firmware, Phoenixcontact Charx Sec-3100 Firmware, Phoenixcontact Charx Sec-3150 Firmware.

How do I fix CVE-2025-24003?

No fix has been published for CVE-2025-24003 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-24003 being exploited?

There is no known exploitation of CVE-2025-24003 in the wild and no public exploit code.

Other vulnerabilities in Phoenix Contact CHARX SEC-3000

• CVE-2025-25270 Remote Code Execution via Unauthenticated Configuration Manipulation Critical 9.8
• CVE-2024-25995 PHOENIX CONTACT: Remote code execution in CHARX Series Critical 9.8
• CVE-2025-25268 Unauthenticated Configuration Access via Exposed API Endpoint High 8.8
• CVE-2025-25271 OCPP Backend Configuration via Insecure Defaults High 8.8
• CVE-2024-26288 PHOENIX CONTACT: Lack of SSL support in CHARX Series High 8.7

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-q779-94w6-29cw.