High severity7.8NVD Advisory· Published Mar 18, 2021· Updated Jun 17, 2026
CVE-2021-26236
CVE-2021-26236
Description
FastStone Image Viewer v.<= 7.5 is affected by a Stack-based Buffer Overflow at 0x005BDF49, affecting the CUR file parsing functionality (BITMAPINFOHEADER Structure, 'BitCount' file format field), that will end up corrupting the Structure Exception Handler (SEH). Attackers could exploit this issue to achieve code execution when a user opens or views a malformed/specially crafted CUR file.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- FastStone/FastStone Image Viewerdescription
<=7.5+ 1 more
- (no CPE)range: <=7.5
- cpe:2.3:a:faststone:image_viewer:*:*:*:*:*:*:*:*range: <=7.5
Patches
Vulnerability mechanics
References
3- voidsec.com/advisories/cve-2021-26236-faststone-image-viewer-v-7-5-stack-based-buffer-overflow/nvdExploitThird Party Advisory
- voidsec.com/fuzzing-faststone-image-viewer-cve-2021-26236nvdExploitThird Party Advisory
- www.exploit-db.com/exploits/49660nvdExploitThird Party AdvisoryVDB Entry
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