ABB RMC-100 and RMC-100 LITE Hard-Coded Cryptographic Key Vulnerability Allowing MQTT Decryption

Vulnerability

A vulnerability exists in ABB RMC-100 and RMC-100 LITE devices due to the use of hard-coded cryptographic keys. This flaw enables an attacker to access salted information and decrypt MQTT data. The vulnerability affects RMC-100 versions 2105457-043 through 2105457-045 and RMC-100 LITE versions 2106229-015 through 2106229-016.

Impact

Exploitation of this vulnerability allows for unauthorized decryption of MQTT information, potentially leading to exposure of sensitive data.

Added: Jul 3, 2025, 5:23 PM
Updated: Jul 3, 2025, 5:23 PM

Vulnerability Rating

Custom Algorithm
spread
0.3
impact
2.5
exploitability
7.0
remediation
0.0
relevance
0.2
threat
0.0
urgency
2.9
incentive
5.8

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.