A maliciously crafted DWG file, when parsed through Autodesk AutoCAD and certain AutoCAD-based products, can force a Stack-based Buffer Overflow. A malicious actor can leverage this vulnerability to cause a crash, read sensitive data, or execute arbitrary code in the context of the current process.
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
The product writes data past the end, or before the beginning, of the intended buffer.