How do I check whether I am affected by CVE-2026-43835?

Open the ADAM-3600 web UI or EdgeLink system info and read the firmware version. Anything below 2.8.5.0 is affected. Also check whether the web or management interface is reachable from untrusted networks.

What is the fix for CVE-2026-43835?

Upgrade ADAM-3600 EdgeLink firmware to 2.8.5.0 or later (download from the Advantech ADAM-3600 firmware support page). Until then, restrict network access to the device, use strong unique admin credentials, and only install firmware obtained directly from Advantech.

Who is not affected by CVE-2026-43835?

Not affected if: firmware-2.8.5.0-or-later, no-authenticated-access, unauthenticated-only-access.

Live › vulnerability › CVE-2026-43835

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high8.6Infrastructure

Firmware upgrade accepts forged images, letting an authenticated user persist on device

Advantech ADAM-3600 EdgeLink RTU firmware before 2.8.5.0 does not properly verify firmware upgrade files. An authenticated admin-level user can upload a forged image and persistently take over the device. Part of a batch of 30 fixes released together.

Summary written from the sources below. Check the originals before acting.

CVSS 4.0

8.6

high

scored by 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4

known so far5 of 6

missing: exploitation

First public: Oct 20, 2026 UTC
Last modified: Oct 24, 2026
Status: open
Known exploitation: None reported
Public exploit: None on GitHub
EPSS: not scored

First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.

Why it is high, and not just CVSS

Likelihood → · Impact ↓

critical

high

medium

high

medium

low

medium

low

Exploited: No reports yet.
Needs login: Yes.
Needs a special setup: Not known from the sources.
Reachable from: network.
Worst case: Attacker gains permanent control of the device through a forged firmware image.
CVSS said: 8.6. The facts above say medium; we keep the sources' high until an analyst looks.

Who is affected

1 product

Know the next one before it finds you.

Add to Slack

Live › vulnerability › CVE-2026-43835

Go to dashboard

high8.6Infrastructure

Firmware upgrade accepts forged images, letting an authenticated user persist on device

Summary written from the sources below. Check the originals before acting.

CVSS 4.0

8.6

high

scored by 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4

known so far5 of 6

missing: exploitation

First public: Oct 20, 2026 UTC
Last modified: Oct 24, 2026
Status: open
Known exploitation: None reported
Public exploit: None on GitHub
EPSS: not scored

First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.

Why it is high, and not just CVSS

Likelihood → · Impact ↓

critical

high

medium

high

medium

low

medium

low

Exploited: No reports yet.
Needs login: Yes.
Needs a special setup: Not known from the sources.
Reachable from: network.
Worst case: Attacker gains permanent control of the device through a forged firmware image.
CVSS said: 8.6. The facts above say medium; we keep the sources' high until an analyst looks.

Who is affected

1 product

Know the next one before it finds you.

Add to Slack

Firmware upgrade accepts forged images, letting an authenticated user persist on device

Why it is high, and not just CVSS

Who is affected

Know the next one before it finds you.

Firmware upgrade accepts forged images, letting an authenticated user persist on device

Why it is high, and not just CVSS

Who is affected

Know the next one before it finds you.

How to check

The fix

Who had it, and when

What the sources say, verbatim

Sources