CVE-2024-26000
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn unauthenticated remote attacker can read memory out of bounds due to improper input validation in the MQTT stack. The brute force attack is not always successful because of memory randomization.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceAn unauthenticated remote attacker can read memory out of bounds in the MQTT protocol stack due to improper input validation. The vulnerability allows reading arbitrary memory contents, though exploitation reliability is reduced by memory randomization mechanisms.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 1.5.1< 1.5.1< 1.5.1< 1.5.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify device modelAccess the device management interface or check the physical device label to confirm the model is Phoenixcontact Charx Sec 3000, 3050, 3100, or 3150Affected if The device model is NOT one of these four Charx Sec variants
-
Check firmware versionNavigate to the device firmware or system information page in the web management interface, or use the vendor CLI tool to query the firmware version. Compare the installed version against 1.5.1Affected if Firmware version is below 1.5.1 (for example, 1.4.0, 1.4.2, 1.5.0)
-
Verify MQTT protocol stack is enabledCheck the device configuration settings for MQTT client or broker settings. Look for MQTT enable/disable status in the network services or protocol configuration sectionAffected if MQTT is enabled and configured on the device
-
Check MQTT network exposureReview firewall rules or network access controls to determine if the MQTT port (typically 1883 for unencrypted or 8883 for TLS) is exposed to untrusted network segments or the internetAffected if MQTT service is accessible from untrusted networks without authentication barriers
You are affected if you have a Charx Sec 3000/3050/3100/3150 device running firmware below version 1.5.1 with MQTT protocol stack enabled and reachable.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped1.5.1
Apply vendor-supplied patches or updates to the affected MQTT implementation. If no patch is available, restrict network access to MQTT services and implement additional network segmentation to limit exposure.
Firmware version 1.5.1
- Obtain the firmware version 1.5.1 or later from the vendor (Charx)
- Review the vendor's official firmware upgrade documentation for the specific Charx Sec model (3000, 3050, 3100, or 3150)
- Follow the vendor's recommended procedure to upload and apply the new firmware
- After upgrade, verify the firmware version is 1.5.1 or higher
- Confirm the MQTT service is functioning normally post-upgrade
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-26000 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2024-26000 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data