CVE-2023-27407
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 SCALANCE LPE9403 (All versions < V2.1). The web based management of affected device does not properly validate user input, making it susceptible to command injection. This could allow an authenticated remote attacker to access the underlying operating system as the root user.
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 confidenceA command injection vulnerability exists in the web-based management interface of SCALANCE LPE9403 devices. Due to improper input validation, an authenticated remote attacker can inject arbitrary OS commands and execute them with root privileges.
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< 2.1CVSS 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
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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 is SCALANCE LPE9403Access the device's web management interface or check device inventory/system information to verify the exact model number displays as SCALANCE LPE9403Affected if The device model is SCALANCE LPE9403 and the firmware version is below 2.1
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Check installed firmware versionLog into the web management interface and navigate to System > Firmware or System > Information to view the currently installed firmware version. Alternatively, use the device's CLI and run 'show version' or similar commandAffected if The firmware version displayed is less than 2.1 (for example, 2.0.x or earlier)
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Verify web management interface is enabledCheck the device configuration for web-based management settings. Typically found under System > Network Services or similar menu in the web interface, or via CLI configuration modeAffected if The web-based management interface (HTTP/HTTPS) is enabled and accessible on the device
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Confirm web interface is network-accessibleAttempt to reach the device's web interface from a workstation by browsing to the device IP address over HTTP/HTTPS. Verify the interface responds and presents a login pageAffected if The web management interface is reachable from your network, indicating it is actively serving HTTP/HTTPS
The device is affected if it is a SCALANCE LPE9403 running firmware version below 2.1 and the web-based management interface is enabled and accessible on the network.
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 · scoped2.1
Upgrade SCALANCE LPE9403 firmware to V2.1 or later. If immediate patching is not possible, restrict network access to the web management interface and monitor for unauthorized access attempts.
V2.1
- Download SCALANCE LPE9403 firmware version V2.1 or later from the official Siemens cert-portal or Siemens support portal
- Access the web-based management interface of the affected LPE9403 device
- Navigate to the firmware update or system administration section
- Upload and apply the V2.1 firmware file following the device's documented upgrade procedure
- Allow the device to complete the firmware update and reboot process
- Log into the web management interface and verify the firmware version displays as V2.1 or later
- Confirm the web-based management functionality is operating normally
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-27407 — 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-2023-27407 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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