This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Unitronics VisiLogic OPLC IDE. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the TeePreviewer object in TeeChart5.ocx. The ChartLink accessor of the object takes a user-supplied integer and interprets it as an address, which can cause arbitrary memory to be interpreted as an object. An attacker can leverage this vulnerability to execute arbitrary code under the context of the user.