CVE-2026-116463
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Out-of-Bounds Read in FastStone Image Viewer

Publication date: 2026-10-26

Last updated on: 2026-10-26

Assigner: VulDB

Description
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.

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Meta Information

Published
2026-10-26
Last Modified
2026-10-26
Generated
2026-10-26
AI Q&A
2026-10-26
EPSS Evaluated
N/A
NVD
CVE-2026-116463
EUVD
EUVD-2026-110055

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This vulnerability is an out-of-bounds read issue in FastStone Image Viewer up to version 8.5. It exists in the Box-Average Downsampler Engine component, specifically in the function FUN_0062d96c. An attacker can exploit this remotely by manipulating input data, leading to unintended memory access.

Impact Analysis

This vulnerability may allow attackers to read sensitive memory data, potentially leading to information disclosure. It could cause crashes or unexpected behavior in the application. Since it is remotely exploitable, users could be affected without direct interaction.

Mitigation Strategies

Update FastStone Image Viewer to the latest version if available. If no update is available, consider discontinuing use of the affected software until a patch is released.

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