cve/2021/CVE-2021-26233.md

### [CVE-2021-26233](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26233)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

FastStone Image Viewer <= 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.

### POC

#### Reference
- https://voidsec.com/advisories/cve-2021-26233-faststone-image-viewer-v-7-5-user-mode-write-access-violation/

#### Github
No PoCs found on GitHub currently.