CVE-2021-26235: Null Pointer Dereference
FastStone Image Viewer <= 7.5 is affected by a user mode write access violation near NULL at 0x005bdfc9, 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.
Affected Software
Event History
Frequently Asked Questions
What is the vulnerability ID for FastStone Image Viewer?
The vulnerability ID for FastStone Image Viewer is CVE-2021-26235.
What is the severity of CVE-2021-26235?
The severity of CVE-2021-26235 is high with a CVSS score of 7.8.
How does CVE-2021-26235 affect FastStone Image Viewer?
CVE-2021-26235 affects FastStone Image Viewer by causing a user mode write access violation near NULL, which can lead to a Denial of Service (DoS) or possibly code execution.
How can an attacker exploit CVE-2021-26235?
An attacker can exploit CVE-2021-26235 by providing a malformed CUR file that is mishandled by FSViewer.exe, resulting in a user mode write access violation.
Is there a fix available for CVE-2021-26235?
At the time of writing, there may not be a fix available for CVE-2021-26235. It is recommended to update to the latest version of FastStone Image Viewer or apply any patches or mitigations provided by the vendor.