Advantech ADAM-3600 EdgeLink: Stack-based buffer overflow in login
Summary
Advantech ADAM-3600 EdgeLink, an industrial remote terminal unit used for data acquisition and remote monitoring, contains a stack-based buffer overflow in its login functionality. An attacker who can reach the login service can exploit it to execute code on the device. The CVSS 4.0 score is 9.2 (critical), but the vector shows high attack complexity, and the vendor advisory and CSA alert describe the issue as requiring no credentials.
Affected
- Advantech ADAM-3600 EdgeLink prior to version 2.8.5.0 (CSA alert; version boundary to be confirmed in the vendor advisory)
Fixed in
- EdgeLink firmware v2.8.5.0 (vendor advisory ACIRT-261001, last updated 2026/10/15)
Workaround
Unknown. No vendor-published workaround specific to CVE-2026-43838 was found. Restrict network access to the device as a general measure.
Exploitation
- CISA SSVC: exploitation none, automatable no
- Not listed in CISA KEV at time of research
- No public exploit or in-the-wild exploitation confirmed at time of research
Our recommendation
- Inventory all ADAM-3600 / EdgeLink devices and their firmware versions
- Confirm the fixed version in advisory ACIRT-261001 and check whether v2.8.5.0 is approved for production use
- Remove any internet exposure and restrict management access to a trusted OT network segment until patched
- Apply the firmware update; patch the whole product line, as Advantech published 30 related CVEs at the same time
- Monitor the vendor advisory and CSA for updates or exploit reports
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- CSA alert AL-2026-149 www.csa.gov.sg
- Advantech security advisories www.advantech.com
- Advantech ADAM-3600 advisory PDF advcloudfiles.advantech.com
- VulDB entry CVE-2026-43838 vuldb.com
- OpenCVE CVE-2026-43838 app.opencve.io
- ThreatInt CVE-2026-43838 cve.threatint.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 31 Oct 2026, 04:13.
Original description (NVD)
A stack-based buffer overflow vulnerability in the login functionality could allow an 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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