Advantech ADAM-3600: NULL pointer dereference in logs management causes crash
Summary
A NULL pointer dereference in the logs management functionality of the Advantech ADAM-3600 remote terminal unit (EdgeLink) allows an unauthenticated network attacker to crash the service. The impact is limited to availability (denial of service); confidentiality and integrity are not affected per the CNA vector. The vendor does not state whether a crash takes down the whole device.
Affected
- ADAM-3600 (EdgeLink) firmware prior to version 2.8.5.0
Fixed in
- Firmware 2.8.5.0 (Advantech advisory ACIRT-261001).
- Caution: the firmware file is named 2.8.5.0_Beta. Confirm on Advantech's download page that it is a released production version before rollout.
Workaround
- Unknown. No vendor-documented workaround for this CVE.
- Restricting network access to the device is a sensible interim measure.
Exploitation
- CISA SSVC: exploitation none, automatable yes.
- Not listed in CISA KEV. EPSS about 0.34%.
- No public proof of concept or exploitation reported as of today.
Our recommendation
- Inventory all ADAM-3600 devices and their firmware versions.
- Ensure management and logs interfaces are not reachable from untrusted networks or the internet.
- Verify the 2.8.5.0 release status with Advantech, then update, prioritising the higher-severity CVEs in the same advisory (for example CVE-2026-43838).
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 (US) www.advantech.com
- Advantech ADAM-3600 security advisory PDF advcloudfiles.advantech.com
- OpenCVE CVE-2026-43839 app.opencve.io
- VulDB CVE-2026-43839 vulnerability 422704 vuldb.com
- Vulners PT-2026-118274 vulners.com
- CVE Details Advantech vendor list www.cvedetails.com
- Safeguard analysis of ADAM-3600 EdgeLink CVEs safeguard.sh
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, 01:33.
Original description (NVD)
A NULL pointer dereference vulnerability in the logs management functionality could allow an unauthenticated attacker to crash the service.
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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