---
id: "CVE-2026-43845"
kind: "vulnerability"
aliases: ["CVE-2026-43845"]
title: "Unnamed product: password reset flaw lets attackers bypass login"
severity: "critical"
cvss: 9.2
epss: null
exploited: false
status: "resolved"
category: "other"
products: [{"name": "ADAM-3600 EdgeLink", "fixed": ["2.8.5.0"], "affected": "< 2.8.5.0", "ecosystem": "vendor"}]
ecosystems: []
tags: ["adam-3600", "advantech", "auth-bypass", "edgelink", "ics", "ot", "other", "rtu"]
not_affected_if: ["firmware-2.8.5.0-or-later"]
published_at: "2026-10-20T09:17:10+00:00"
first_seen_at: "2026-10-23T21:57:20+00:00"
updated_at: "2026-10-23T23:22:26+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43845", "first_seen_at": "2026-10-23T21:57:20+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-23T23:22:26+00:00"}]
---

# Unnamed product: password reset flaw lets attackers bypass login

Advantech ADAM-3600 EdgeLink (industrial remote terminal unit) firmware before 2.8.5.0 has a flaw in its password reset/recovery logic (CWE-640). A remote, unauthenticated attacker can bypass authentication by abusing it. Advantech's advisory says the password was reset to default if the program restarted after an attack-induced exception. CVSS 4.0 9.2. Reported by Nozomi Networks (Simone Bossi, Raffaele Bova). Part of a 30-CVE batch fixed together. No known exploitation.

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

## Affected

- vendor:ADAM-3600 EdgeLink affected < 2.8.5.0 fixed 2.8.5.0

## How to check

Check the ADAM-3600 firmware/EdgeLink version in the device web UI or EdgeLink Studio. Anything below 2.8.5.0 is affected. Also check whether the device's management ports (including proprietary protocol ports 6001/7001) are reachable from untrusted networks.

## Fix

Upgrade ADAM-3600 firmware to 2.8.5.0 or later. Advantech's fix makes password recovery run only on the first power-on, so a crash and restart no longer resets the password to default. Until patched, restrict network access to the device.

## Timeline

- 2026-10-23T21:57:20+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-43845
- 2026-10-23T23:22:26+00:00 analyst — Product identified as Advantech ADAM-3600 EdgeLink (CNA data in NVD API; Advantech ACIRT-261001 item 17, NN-2026-0006). Fixed in 2.8.5.0 per Advantech/CSA/Canadian Cyber Centre. No exploitation or public PoC found; social search skipped (niche ICS product). One of 30 CVEs in the same advisory.

## 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
- [mentions] Canadian Cyber Centre AV26-1065: Advantech ADAM-3600 prior to v2.8.5.0 https://www.cyber.gc.ca/en/alerts-advisories/control-systems-advantech-security-advisory-av26-1065

## From the sources

A vulnerability in the password reset mechanism could allow an attacker to bypass the authentication mechanism.

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