critical severity September 22, 2026 · 1 min read

CISA ICS Advisory: lwIP TCP/IP Stack MQTT Client Application

Here’s what this advisory affects, and what to do about it.

Successful exploitation of this vulnerability could allow an attacker to gain full code execution on the device.

CISA ICS Advisory: lwIP TCP/IP Stack MQTT Client Application

CISA has published an ICS advisory warning that a vulnerability in the lwIP TCP/IP Stack MQTT Client Application could allow an attacker to gain full code execution on affected devices.

Watch this company

Get alerted the next time this company files a breach with any US regulator — the filing, dated and sourced. A free single-company slice of Signals; no account needed.

We’ll email you only about this company’s future breach filings and how to watch a whole vendor list — not general marketing. Unsubscribe any time.

Watching your whole vendor list (50 to 500 companies, by tier) is GalaxyWarden Signals.

Remote code execution via lwIP MQTT client

The advisory describes a flaw in the MQTT client implementation of the widely used lwIP open-source TCP/IP stack. Successful exploitation could allow an attacker to achieve full code execution on the targeted device.

Exposure Pack · one payment

The full list, and what to lock in ten minutes.

Every indexed leak tied to your address — all of them, named and dated
A deeper search of collected breach data — the kinds of your information it holds, where it finds you
What this kind of incident typically exposes
A ten-minute lock list written for this kind of organisation

One payment. Nothing renews, and no account is created. Emailed to you within a minute.

Affected products

The vulnerability affects implementations of the lwIP TCP/IP Stack that include the MQTT client application. The advisory does not specify exact version numbers or list particular vendor products that embed the library. It applies to any industrial control system, operational technology, or medical device using a vulnerable build of the lwIP MQTT client.

What to do

Determine whether any ICS, OT, or medical devices in your environment use the lwIP stack with its MQTT client enabled
Review vendor documentation and firmware manifests for lwIP components
Apply updates or patches supplied by the device vendor as they become available
Implement network segmentation and restrict unauthenticated access to MQTT ports where feasible
Monitor the vendor’s security channel and CISA’s ICS advisories for further updates on this issue

Organizations operating industrial control systems or connected medical devices should treat this as a high-priority review item because full code execution on such devices can have direct physical consequences.

What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo

value redacted in this samplephone, household, property recordsBeenVerified

value redacted in this sample580 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach

unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Check your exposure

This is one listing. Your email is probably in others.

We can’t confirm any single incident against the sources we search, so we won’t pretend to. What we can show you is your own exposure — your email against 13.1B+ leaked records and the sites that publish your address. About 15 seconds. No account, no card.

Report details & sourcing

By GalaxyWarden Threat Research · Editorial & sourcing standards

Editorial & sourcing policy

GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.

Sources: CISA ICS Advisory

Related breaches

high October 05, 2026