STDU Viewer 1.6.375 allows attackers to cause a denial of service or possibly have unspecified other impact via a crafted .xps file, related to a "Read Access Violation starting at STDUXPSFile!DllUnregisterServer+0x0000000000005bd5."
https://github.com/wlinzi/security_advisories/tree/master/CVE-2017-14569