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CVE-2026-43856 is a stack-based buffer overflow in the FileProcess::CheckDir function of Advantech ADAM-3600 EdgeLink versions prior to 2.8.5.0. A remote authenticated attacker can trigger the overflow by supplying a path longer than 1,024 bytes, potentially executing arbitrary code on the affected device.
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A stack-based buffer overflow in FileProcess::CheckDir may allow an authenticated remote attacker to execute arbitrary code by supplying a path longer than 1024 bytes. The advisory does not identify the affected product or versions.
A stack-based buffer overflow in FileProcess::CheckDir allows a remote authenticated attacker to potentially execute arbitrary code by supplying a path longer than 1024 bytes. The supplied CVSS v4.0 vector indicates high privileges are required, low attack complexity, no user interaction, and high impacts to the vulnerable system's confidentiality, integrity, and availability. The history records receipt of the CVE on October 20, 2026, but does not identify the affected product or versions.
Stack buffer overflow in FileProcess::CheckDir permits remote authenticated arbitrary code execution using a path longer than 1024 bytes. Reported severity: 8.6 (High).
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.