---
id: "CVE-2026-43846"
kind: "vulnerability"
aliases: ["CVE-2026-43846"]
title: "Stack buffer overflow in a non-functional feature allows code execution"
severity: "high"
cvss: 8.6
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "ADAM-3600", "fixed": ["2.8.5.0"], "affected": "< 2.8.5.0", "ecosystem": "vendor"}]
ecosystems: []
tags: ["adam-3600", "advantech", "edgelink", "firmware", "ics", "other", "rce", "unknown"]
not_affected_if: ["firmware-2.8.5.0-or-later", "not-using-adam-3600", "unknown"]
published_at: "2026-10-20T09:17:11+00:00"
first_seen_at: "2026-10-23T21:57:20+00:00"
updated_at: "2026-10-24T00:15:58+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43846", "first_seen_at": "2026-10-23T21:57:20+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-24T00:15:58+00:00"}]
---

# Stack buffer overflow in a non-functional feature allows code execution

Stack-based buffer overflow in a non-functional feature of Advantech ADAM-3600 EdgeLink remote terminal units. An authenticated, high-privilege network attacker can get code execution. CVSS 4.0 8.6. Part of a batch of about 30 ADAM-3600 CVEs disclosed 2026-10-20; the vendor patched 2026-10-15. No known exploitation or public PoC.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:ADAM-3600 affected < 2.8.5.0 fixed 2.8.5.0

## How to check

Check the ADAM-3600 firmware version in the device web UI or EdgeLink management; versions below 2.8.5.0 are affected. Also check whether the management interface is reachable from untrusted networks.

## Fix

Update ADAM-3600 firmware to 2.8.5.0 or later (inferred from 'prior to 2.8.5.0'; confirm on the Advantech security advisory page). Restrict management access to trusted networks and use strong admin credentials.

## Timeline

- 2026-10-23T21:57:20+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-43846
- 2026-10-24T00:15:58+00:00 analyst — Advantech ADAM-3600 EdgeLink RTU; CVE record says affected prior to 2.8.5.0 (fixed version inferred, vendor page advantech.com/en/security-advisory not read directly). Part of CSA AL-2026-149 batch of ~30 CVEs (43829-43858). No exploitation or PoC found, not in KEV. No community posts searched (industrial product, CVE id only).

## Documents

- [advisory] CSA Singapore AL-2026-149: Advantech ADAM-3600 EdgeLink multiple vulnerabilities https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-149
- [describes] CVE Record CVE-2026-43846 (affected: prior to 2.8.5.0) https://www.cve.org/CVERecord?id=CVE-2026-43846

## From the sources

A stack-based buffer overflow vulnerability in a non-functional feature could allow an authenticated attacker to achieve code execution.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_