threat-intel
ABB AC500 V2
Medium
Summary
ABB has identified and addressed vulnerabilities in its AC500 V2 PLC firmware, specifically versions up to 2.5.3. An attacker could potentially access Modbus telegram fragments by sending unsupported function codes to the PLC's Modbus server. This poses a risk to critical infrastructure sectors like manufacturing, energy, and water/wastewater, highlighting the importance of secure Modbus communication practices.
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