CVE-2026-116463
FastStone Image Viewer Box-Average Downsampler FUN_0062d96c out-of-bounds
A vulnerability was identified in FastStone Image Viewer up to 8.5. Affected is the function FUN_0062d96c of the component Box-Average Downsampler Engine. The manipulation leads to out-of-bounds read. It is possible to initiate the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Image Viewer FastStone |
8.0 (affected) 8.1 (affected) 8.2 (affected) 8.3 (affected) 8.4 (affected) 8.5 (affected) |
CNA: VulDB |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.3 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X | CNA: VulDB |
| 3.1 / 6.3 medium |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R | CNA: VulDB |
| 3.0 / 6.3 medium |
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R | CNA: VulDB |
| 2.0 / 7.5 high |
AV:N/AC:L/Au:N/C:P/I:P/A:P/E:ND/RL:ND/RC:UR | CNA: VulDB |
Exploit evidence
- https://vuldb.com/submit/1013651
exploit · ADP: CISA-ADP
References
- https://vuldb.com/vuln/426360CNA: VulDB · vdb-entry, technical-description
- https://vuldb.com/vuln/426360/ctiCNA: VulDB · signature, permissions-required
- https://vuldb.com/cve/CVE-2026-116463CNA: VulDB · third-party-advisory
- https://vuldb.com/submit/1013651CNA: VulDB · third-party-advisory
- https://vuldb.com/submit/1013651ADP: CISA-ADP · exploit
For agents and automation
Read public disclosures for free as Markdown or JSON. Compatible browsers also expose native WebMCP tools to search disclosures, read this page, and discover API access.
Use the ontology-linked Cyber API with x402 pay per request, or a Y2 Pro or Elite API key with the intel:cyber scope.
Endpoints and access details
https://api.y2.dev/api/v2/cyber/cveshttps://api.y2.dev/api/v2/cyber/cves/{cveId}
A workspace owner or admin can create a Pro or Elite API key. Send Authorization: Bearer <Y2_API_KEY> from your trusted agent runtime.
For x402, omit Authorization and read the HTTP 402 payment challenge before signing a retry. Public browser tools do not make payments.