Quick answers
- Is CVE-2026-43840 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-43840 being exploited in the wild.
- How severe is CVE-2026-43840?
- Informational severity, published 20 October 2026.
- Which products and versions are affected?
- Advantech ADAM-3600 EdgeLink.
- Is there a fix for CVE-2026-43840?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-43840 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-43840?
- Check whether you run Advantech ADAM-3600 EdgeLink. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A NULL pointer dereference vulnerability exists in the license manager service's on_disconnected callback function in the ADAM-3600 EdgeLink device. An unauthenticated attacker on the network can trigger this defect to crash the service. The vulnerability results in a denial of service condition affecting the device's licensing and operational capabilities.
Affected products
- Advantech ADAM-3600 EdgeLink
Timeline
- 2026-10-20: disclosed