CVE-2021-26236

moderate-risk
Published 2021-03-18

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.

Do I need to act?

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0.74% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Faststone

References (6)

Exploit https://voidsec.com/advisories/cve-2021-26236-faststone-image-viewer-v-7-5-stack...
Exploit https://voidsec.com/fuzzing-faststone-image-viewer-cve-2021-26236
Exploit https://www.exploit-db.com/exploits/49660
Exploit https://voidsec.com/advisories/cve-2021-26236-faststone-image-viewer-v-7-5-stack...
Exploit https://voidsec.com/fuzzing-faststone-image-viewer-cve-2021-26236
Exploit https://www.exploit-db.com/exploits/49660
31
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 2/34 · Minimal
Exposure 5/34 · Minimal