CVE-2021-26237

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-18 · updated 2026-06-17
Weakness: CWE-787

Description

FastStone Image Viewer <= 7.5 is affected by a user mode write access violation at 0x00402d7d, 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 products

FastStone Image Viewer: through 7.5

References

https://voidsec.com/advisories/cve-2021-26237-faststone-image-viewer-v-7-5-user-mode-write-access-violation/
https://voidsec.com/advisories/cve-2021-26237-faststone-image-viewer-v-7-5-user-mode-write-access-violation/

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