CVE-2023-4212
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 command injection vulnerability exists in Trane XL824, XL850, XL1050, and Pivot thermostats allowing an attacker to execute arbitrary commands as root using a specially crafted filename. The vulnerability requires physical access to the device via a USB stick.
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 in Trane XL824, XL850, XL1050, and Pivot thermostats allows root-level command execution by inserting a specially crafted filename on a USB stick into the device, exploiting insufficient input validation during USB file processing.
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<= 5.9.8<= 5.9.8<= 5.9.8<= 1.8CVSS 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
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/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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Identify thermostat modelLocate the model number on the device label or check the device web interface for the model name (XL824, XL850, XL1050, or Pivot)Affected if Model is one of XL824, XL850, XL1050, or Pivot
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Check firmware versionAccess the device web interface or local display and navigate to the About/System Info section to find the firmware versionAffected if Firmware version is 5.9.8 or lower for XL824/XL850/XL1050, or 1.8 or lower for Pivot
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Determine if USB ports are accessiblePhysically inspect the device for USB ports and check if USB functionality is enabled in the device settings or configuration menuAffected if USB ports are present and USB functionality is enabled on the device
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Assess physical access controlsEvaluate whether the device is located in an area with unrestricted physical access where an attacker could insert a USB stickAffected if Device is in a publicly accessible or unsecured location where unauthorized USB insertion is possible
You are affected if you have a Trane XL824, XL850, XL1050, or Pivot thermostat running firmware at or below the affected version, with USB ports accessible in a location where physical access cannot be restricted.
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 · scopedRestrict physical access to thermostats and disable USB functionality where possible; contact Trane for firmware patches addressing the command injection vulnerability.
Firmware > 5.9.8 for Xl824/Xl850/Xl1050; Firmware > 1.8 for Pivot (contact Trane for exact patched release)
- Contact Trane Technical Support at hub.tranetechnologies.com or through official channels to request the firmware update that addresses CVE-2023-4212
- Verify the current firmware version on the affected thermostat (Xl824, Xl850, Xl1050, or Pivot) by accessing the device settings
- Request and obtain the patched firmware version from Trane - the fixed release is expected to be above version 5.9.8 for Xl824/Xl850/Xl1050 and above 1.8 for Pivot
- Follow Trane's official firmware update procedure, which may involve USB upload as described in the device documentation
- After updating, verify the new firmware version displays the patched release number
- Ensure physical security measures are in place to prevent unauthorized physical access via USB ports, as the attack vector requires physical insertion of a USB stick with a crafted filename
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 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 $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-4212 — 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-2023-4212 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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