CVE-2026-30040

mediumCVSS 6.5covered by 1 sourcefirst seen 2026-06-26

A heap overflow in the FSViewer.exe process of FastStone Image Viewer v8.3 allows attackers to cause a execute arbitrary code in the context of the current process via supplying a crafted JPEG 2000 (JP2) file.

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Exploitation outlook

Low exploitation risk0.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-30040: A heap overflow in the FSViewer.exe process of FastStone Image Viewer v8.3 allows attackers to…nvd · 2026-06-26

External references

NVD record for CVE-2026-30040

CVE.org record

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