CVE-2026-44098
Received Received - Intake

OS Command Injection in OCPP Backend via Firewall-Bypass

Publication date: 2026-07-30

Last updated on: 2026-07-30

Assigner: CERT VDE

Description
This vulnerability allows an unauthenticated remote attacker with control over the OCPP backend via firewall-bypass to perform an OS command injection, resulting in the execution of arbitrary commands as the limited user charx-oa. Charging could be interrupted.

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Meta Information

Published
2026-07-30
Last Modified
2026-07-30
Generated
2026-08-19
AI Q&A
2026-07-30
EPSS Evaluated
2026-08-18
NVD
CVE-2026-44098
EUVD
EUVD-2026-51033

Affected Vendors & Products

Showing 5 associated CPEs
Vendor Product Version / Range
phoenix_contact charx_sec-3xxx to 1.9.1 (exc)
phoenix_contact charx_3000 to 1.9.1 (exc)
phoenix_contact charx_3050 to 1.9.1 (exc)
phoenix_contact charx_3100 to 1.9.1 (exc)
phoenix_contact charx_3150 to 1.9.1 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

This vulnerability allows an unauthenticated remote attacker to bypass firewalls and execute arbitrary OS commands as a limited user named charx-oa on a system controlled by an OCPP backend. This could disrupt charging operations.

Detection Guidance

Detection requires monitoring for unusual command execution patterns or network traffic from OCPP backend systems. Check logs for unexpected commands run as the 'charx-oa' user. Inspect firewall rules for unauthorized bypasses allowing remote OCPP backend access.

Impact Analysis

An attacker could interrupt charging services, execute unauthorized commands on the system, and potentially gain limited control over the affected infrastructure.

Compliance Impact

This vulnerability could lead to unauthorized access, data theft, or service disruption in EV charging controllers. Such breaches may violate compliance requirements under GDPR (data protection) and HIPAA (health data security) due to potential exposure of sensitive user or operational data.

Mitigation Strategies

Immediately restrict firewall rules to block unauthorized OCPP backend access. Update OCPP backend software to patch the command injection flaw. Monitor systems for signs of exploitation and disable the 'charx-oa' user if compromised.

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