A NULL pointer dereference in the component libPdfCore.dll of Wondershare PDF Reader v1.0.9.2544 allows attackers to cause a Denial of Service (DoS) via a crafted PDF file.
https://pdf.wondershare.com/pdf-reader.html
https://github.com/Nero22k/Disclosures/tree/main/Wondershare%20PDF%20Reader