CVE-2024-7507
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 · uneditedCVE-2024-7507 IMPACT A denial-of-service vulnerability exists in the affected products. This vulnerability occurs when a malformed PCCC message is received, causing a fault in the controller.
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 · low confidenceThis is a denial-of-service vulnerability in industrial control system (ICS) products involving malformed PCCC (Programmable Controller Communication Command) messages. When a specially crafted or malformed PCCC message is received by an affected controller, it triggers a fault condition causing the controller to fail or become unresponsive.
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>= 28.011, < 34.014= 35.011>= 28.011, < 34.014= 35.011>= 31.011, < 34.014= 35.011>= 31.011, < 34.014= 35.011>= 32.013, < 34.014= 35.011>= 32.011, < 34.014= 35.011CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.
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Identify controller modelUse RSLinx Classic, FactoryTalk Linx, or the controller's web interface to determine if the device is a Compactlogix 5380, Controllogix 5580, Guardlogix 5580, Compact Guardlogix 5380, or Compactlogix 5480 controllerAffected if Controller is any of these model families
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Check firmware versionAccess controller properties via RSLinx Classic, FactoryTalk Linx, or controller web interface to view the firmware revision. Compare against the affected version ranges: >= 28.011 and < 34.014, or exactly version 35.011Affected if Installed firmware version falls within the affected ranges
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Verify PCCC communication exposureReview controller communication configuration in Studio 5000 Logix Designer. Check if Ethernet/IP with PCCC messaging or serial PCCC ports are enabled and accessible on the networkAffected if PCCC communication is enabled and reachable on the network
If the controller model is an affected product family AND the firmware version is within the specified ranges AND PCCC communication is exposed, the environment is vulnerable to denial-of-service via malformed PCCC messages.
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 · scoped34.014
Apply vendor-provided firmware updates for affected products; until patches are available, implement network segmentation and monitor for anomalous PCCC traffic to mitigate exploitation.
Firmware version 34.014 or later for all affected product lines (Compactlogix 5380, Controllogix 5580, Guardlogix 5580, Compact Guardlogix 5380 SIL 2/3, Compactlogix 5480)
- 1. Identify the specific Rockwell Automation Controllogix/Guardlogix/Compactlogix controller model and current firmware version in your environment.
- 2. Download the firmware version 34.014 (or later stable release) from the official Rockwell Automation website or through your standard update channel.
- 3. Review Rockwell Automation's firmware update instructions and ensure all prerequisites are met, including backup of controller project and safety documentation if applicable.
- 4. In a non-production environment first, validate that the new firmware is compatible with your existing project, tags, and communication configurations.
- 5. Schedule a maintenance window as firmware updates will require controller power cycles.
- 6. Apply the firmware update to affected controllers following Rockwell Automation's published procedures.
- 7. After update, verify controller operation and confirm the vulnerability is remediated by testing normal PCCC message handling.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA8.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-7507 — 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-2024-7507 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
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- 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
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