IrfanView 4.50 - 64bit with CADImage plugin version 12.0.0.5 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 CADIMAGE+0x00000000003d246f."
https://github.com/wlinzi/security_advisories/tree/master/CVE-2017-15737