---
id: "CVE-2026-43834"
kind: "vulnerability"
aliases: ["CVE-2026-43834"]
title: "Stack buffer overflow in logs settings lets authenticated attacker run code"
severity: "high"
cvss: 7.5
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", "authenticated", "edgelink", "firmware", "ics", "ot", "other", "rtu"]
not_affected_if: ["auth-required", "management-interface-not-reachable"]
published_at: "2026-10-20T08:16:44+00:00"
first_seen_at: "2026-10-23T21:57:20+00:00"
updated_at: "2026-10-25T03:37:13+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43834", "first_seen_at": "2026-10-23T21:57:20+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-25T03:37:13+00:00"}]
---

# Stack buffer overflow in logs settings lets authenticated attacker run code

Authenticated stack buffer overflow in the logs settings function of Advantech ADAM-3600 EdgeLink firmware before 2.8.5.0 allows code execution. Found by Nozomi Networks; fixed by Advantech on 2026-10-15; no known exploitation.

_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/EdgeLink; versions below 2.8.5.0 are affected. Also check whether the management interface is reachable from untrusted networks.

## Fix

Upgrade ADAM-3600 firmware to 2.8.5.0 or later (see Advantech security advisory ACIRT-261001). Restrict network access to the management interface and use strong admin credentials.

## Timeline

- 2026-10-23T21:57:20+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-43834
- 2026-10-25T03:37:13+00:00 analyst — Advantech ADAM-3600 EdgeLink RTU, ACIRT-261001 (one of ~30 CVEs fixed together). Vendor PDF confirms authenticated logs-settings stack overflow; fixed version 2.8.5.0 comes from the CVE record/CSA/Cyber Centre, not the visible part of the PDF, so nothing marked verified. No exploitation or PoC found.

## Documents

- [advisory] Advantech: Vulnerabilities Identified in ADAM-3600 (ACIRT-261001) https://advcloudfiles.advantech.com/cms/de8e2d94-10ab-470e-ac6f-d2e5434f4ec4/Security%20Advisory%20PDF%20File/SECURITY-ADVISORY----ADAM-3600.pdf
- [describes] 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-2026-43834 https://www.cve.org/CVERecord?id=CVE-2026-43834

## From the sources

A stack-based buffer overflow vulnerability in the logs settings functionality 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_