A CWE-787: Out-of-bounds Write vulnerability exists that could cause denial of service when an attacker sends a specially crafted HTTP request to the web server of the device. Affected Product: Modicon M340 CPUs: BMXP34 (Versions prior to V3.40) Modicon M340 X80 Ethernet Communication Modules: BMXNOE0100 (H) BMXNOE0110 (H) BMXNOC0401 BMXNOR0200H RTU (All Versions) Modicon Premium Processors with integrated Ethernet (Copro): TSXP574634 TSXP575634 TSXP576634 (All Versions) Modicon Quantum Processors with Integrated Ethernet (Copro): 140CPU65xxxxx (All Versions) Modicon Quantum Communication Modules: 140NOE771x1 140NOC78x00 140NOC77101 (All Versions) Modicon Premium Communication Modules: TSXETY4103 TSXETY5103 (All Versions)