CVE-2026-44107
Received Received - Intake

Unauthenticated DoS via Modbus TCP in CharxModbusServer

Publication date: 2026-07-30

Last updated on: 2026-07-30

Assigner: CERT VDE

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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-07-30
Last Modified
2026-07-30
Generated
2026-07-30
AI Q&A
2026-07-30
EPSS Evaluated
N/A
NVD
CVE-2026-44107
EUVD
EUVD-2026-51042

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-749 The product provides an Applications Programming Interface (API) or similar interface for interaction with external actors, but the interface includes a dangerous method or function that is not properly restricted.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability allows an unauthenticated attacker to trigger a reboot of a charging controller via Modbus TCP. When the Modbus functionality is enabled by opening the CharxModbusServer port, the attacker can perform a Denial-of-Service attack.

Detection Guidance

Check if the CharxModbusServer port is open and accessible without authentication. Use network scanning tools like nmap to detect open Modbus TCP ports (default 502). Example command: nmap -p 502 <target_IP>. Monitor for unexpected reboot triggers or Denial-of-Service events on the charging controller.

Impact Analysis

An attacker could cause the charging controller to reboot unexpectedly, disrupting charging operations and potentially leading to downtime or service interruptions for users relying on the system.

Mitigation Strategies

Disable Modbus TCP functionality if not required. Restrict network access to the charging controller via firewalls or network segmentation. Ensure strong authentication is enforced if Modbus must remain enabled. Monitor system logs for unauthorized reboot attempts.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-44107. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart