Advantech ADAM-3600: Stack-based buffer overflow in non-functional feature
Summary
Advantech ADAM-3600 EdgeLink, an industrial remote terminal unit, contains a stack-based buffer overflow in a feature that is not functional. An authenticated attacker with high privileges and network access can exploit it to execute code on the device. The CNA and vendor score is 8.6 (High, CVSS 4.0).
Affected
- ADAM-3600 prior to version 2.8.5.0
Fixed in
- Update to ADAM-3600 version 2.8.5.0 or later.
Workaround
- No vendor-documented workaround known.
- Until patched: keep the device off the internet, restrict management and web access to an admin network or VPN, and restrict admin accounts.
- Do not rely on the non-functional feature being disabled; no evidence was found that it is removed from the firmware.
Exploitation
- Not listed in CISA KEV.
- CISA SSVC data: exploitation none, automatable no.
- No public proof of concept or exploit reports found. This does not prove that none exist.
Our recommendation
- Patch ADAM-3600 to version 2.8.5.0 or later, together with all other fixes in Advantech advisory ACIRT-261001, especially the unauthenticated authentication bypass issues CVE-2026-43844 and CVE-2026-43845.
- Identify all ADAM-3600 units and check whether any management interface is reachable from the internet or untrusted networks.
- Replace weak or default credentials and restrict admin accounts.
- Monitor device logs for unexpected logins, configuration changes or crashes.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- CSA Singapore alert AL-2026-149 www.csa.gov.sg
- Advantech Security Advisories www.advantech.com
- Advantech Security Advisory (en-us) www.advantech.com
- Advantech ADAM-3600 advisory PDF advcloudfiles.advantech.com
- OpenCVE CVE-2026-43846 app.opencve.io
- VulDB entry 422707 vuldb.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 07:42.
Original description (NVD)
A stack-based buffer overflow vulnerability in a non-functional feature could allow an authenticated attacker to achieve code execution.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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