CVE-2024-32742
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 · uneditedA vulnerability has been identified in SIMATIC CN 4100 (All versions < V3.0). The affected device contains an unrestricted USB port. An attacker with local access to the device could potentially misuse the port for booting another operating system and gain complete read/write access to the filesystem.
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 · high confidenceThe SIMATIC CN 4100 devices running versions prior to V3.0 contain an unrestricted USB port. An attacker with local/physical access can boot from a USB device to bypass the normal OS and gain complete read/write access to the filesystem, potentially compromising the entire device.
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< 3.0CVSS 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
- Physical
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/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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Confirm device model is SIMATIC CN 4100Locate the device identification label or access device system information to verify the exact model numberAffected if The device is not a SIMATIC CN 4100 model, then this CVE does not apply
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Check installed firmware versionAccess the device firmware management interface or system settings and record the current firmware version numberAffected if The installed firmware version is less than V3.0 (for example, V2.9, V2.8, etc.)
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Verify USB boot configurationEnter the device BIOS or boot configuration menu and check if USB boot or boot from removable media is enabledAffected if USB boot is enabled and accessible, allowing an attacker with physical access to boot from a USB device
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Inspect physical USB port accessibilityExamine the device chassis to determine if USB ports are externally accessible without opening the enclosureAffected if USB ports are externally accessible, enabling physical attackers to connect unauthorized devices
A defender is affected if they are running a SIMATIC CN 4100 device with firmware version prior to V3.0 and the USB ports are physically accessible.
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 · scoped3.0
Update SIMATIC CN 4100 to firmware version V3.0 or later. Additionally, implement physical access controls to restrict unauthorized access to the device USB ports.
V3.0
- 1. Identify the current firmware version of the SIMATIC CN 4100 device by accessing the device management interface or checking the system information.
- 2. Navigate to the Siemens cert-portal (cert-portal.siemens.com) to obtain the fixed firmware version V3.0 or later.
- 3. Review the Siemens firmware update documentation and release notes for the SIMATIC CN 4100 to understand any prerequisites.
- 4. Create a backup of the current device configuration if supported by the device management tools.
- 5. Upload and apply the V3.0 firmware update to the SIMATIC CN 4100 device following the manufacturer's recommended procedure.
- 6. After the firmware update completes, verify the device is running firmware version V3.0 or later.
- 7. Confirm the USB port restriction has been addressed by reviewing the V3.0 release notes or device security settings.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-32742 — 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-2024-32742 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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