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CVE-2026-43840 is a NULL pointer dereference vulnerability in the license manager service of Advantech ADAM-3600 EdgeLink versions prior to 2.8.5.0. An unauthenticated attacker can trigger the vulnerability through the on_disconnected callback function, causing the service to crash.
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No public exploit code observed for this vulnerability.
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A NULL pointer dereference in an unspecified product's license manager service allows an unauthenticated attacker to crash the service through the on_disconnected callback, causing denial of service.
NULL pointer dereference in the license manager's on_disconnected callback permits unauthenticated denial of service through a service crash. Reported severity: 6.9 (Medium).
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Cross-references every affected SKU, including bundled OEM variants.
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