IrfanView 4.50 - 64bit with BabaCAD4Image plugin version 1.3 allows attackers to cause a denial of service or possibly have unspecified other impact via a crafted .dwg file, related to a "Read Access Violation starting at BabaCAD4Image!ShowPlugInOptions+0x000000000001e6b0."
https://github.com/wlinzi/security_advisories/tree/master/CVE-2017-15764