This indicates an attack attempt against a Command Execution vulnerability in the Advantech WebAccess SCADA.
The vulnerability, which is located in the "bwocxrun.ocx" ActiveX control, can be exploited through a vulnerable function. An attacker can exploit this by tricking an unsuspecting user into visiting a malicious webpage and execute Operating System Commands within the context of the logged in users.
Advantech WebAccess prior to 7.2
System Compromise: Remote attackers can execute Operating System Commands within the context of the target users
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