Summary
An unauthenticated remote attacker can exploit several vulnerabilities in Janitza UMG 96RM-E devices to ultimately gain full system access and remote code execution.
Details
Impact
These vulnerabilities in combination allow an unauthenticated remote attacker to fully compromise the system including remote code execution. Further details on each separate vulnerability can be found under vulnerability details.
Remediation
It is strongly advised to update to the newest version. The vulnerabilities are fixed in version 3.14.
Vulnerabilities 4
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Critical 9.8
Command injection in power analyzer via Modbus-TCP and Modbus-RTU
An unauthenticated remote attacker can perform a command injection via Modbus-TCP or Modbus-RTU to gain read and write access on the affected device.
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Medium 6.5
Use of Hard-coded Credentials in power analyzer
An unauthenticated remote attacker may use hardcodes credentials to get access to the previously activated FTP Server with limited read and write privileges.
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Medium 6.5
Incorrect Permission Assignment on power analyzer
An unauthenticated remote attacker who tricks a user to upload a manipulated HTML file can get access to sensitive information on the device. This is a result of incorrect permission assignment for the web server.
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Medium 5.3
Use of a Broken or Risky Cryptographic Algorithm for firmware images of power analyzer
An unauthenticated remote attacker can use firmware images to extract password hashes and brute force plaintext passwords of accounts with limited access.
Revision history
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#1.0.0
Initial Revision
References
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Janitza PSIRT contact
https://www.janitza.com/de-de/service-support/security-issue-ticket
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Janitza advisory overview at CERT@VDE
https://certvde.com/de/advisories/vendor/janitza/
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VDE-2025-079: Janitza: Multiple vulnerabilities in UMG 96RM-E - HTML
https://certvde.com/en/advisories/VDE-2025-079
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Telekom Security Advisory: Multiple vulnerabilities in Janitza UMG 96RM-E
https://github.security.telekom.com/2025/11/multiple-vulnerabilities-in-janitza-umg96rm-e.html