CVE-2021-26233: FastStone Image Viewer v.<= 7.5 - User Mode Write Access Violation

Severity: High

FastStone Image Viewer v.<= 7.5 is affected by a user mode Write Access Violation near NULL at 0x005bdfcb , triggered when a user opens or views a malformed CUR file that is mishandled by FSViewer.exe. Attackers could exploit this issue for a Denial of Service (DoS) or possibly to achieve code execution.