dbcve.org
Wall Connector FirmwareOperating system · Tesla

CVE-2025-8321

MEDIUM · 6.8 CVSS v3.0 Published 2025-07-30
Fix available
A fix is available. Upgrade to 24.44.3 or later.
See remediation →
73/100
Remediation priority · Elevated
No privileges Zero-click

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 · unedited
Tesla Wall Connector Firmware Downgrade Vulnerability. This vulnerability allows physically present attackers to execute arbitrary code on affected installations of Tesla Wall Connector devices. Authentication is not required to exploit this vulnerability. The specific flaw exists within the firmware upgrade feature. The issue results from the lack of an anti-downgrade mechanism. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the device. Was ZDI-CAN-26299.

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 confidence

This is a firmware downgrade vulnerability in Tesla Wall Connector devices where the firmware upgrade process lacks anti-downgrade checks. An attacker with physical access can flash older, vulnerable firmware versions that contain known exploits, then chain this with other vulnerabilities to achieve arbitrary code execution in the device context. No authentication is required for the downgrade attack itself.

MitigationTesla must implement cryptographic anti-downgrade mechanisms that verify firmware version integrity before installation. Users should ensure devices are running the latest firmware and restrict physical access to charging equipment.

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
Wall Connector FirmwareOperating system
Affected:< 24.44.3

CVSS 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:3.0/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify Tesla Wall Connector device
    Locate the physical Tesla Wall Connector hardware unit and confirm the model matches Tesla Wall Connector (Gen 3 or future versions)
    Affected if Device is a Tesla Wall Connector and firmware version is below 24.44.3
  2. Check current firmware version
    Access the Wall Connector via Tesla app or built-in web interface and navigate to Settings > Device Information to view the firmware version number
    Affected if Installed firmware version is less than 24.44.3 (for example, 24.36.0, 23.28.2, etc.)
  3. Verify firmware downgrade capability
    Attempt to initiate a firmware update through the official Tesla app or Wall Connector interface to observe if any anti-downgrade protection prompts appear
    Affected if Device accepts firmware files without prompting warnings about downgrading to older versions or does not verify version integrity before installation

A Tesla Wall Connector is affected if it is running firmware version 24.44.3 or lower, as the lack of anti-downgrade checks allows physical attackers to install vulnerable older firmware versions.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Upgrade available Upgrade to 24.44.3 or later
Fixed in 24.44.3
Interim mitigation

Tesla must implement cryptographic anti-downgrade mechanisms that verify firmware version integrity before installation. Users should ensure devices are running the latest firmware and restrict physical access to charging equipment.

Recommended fix High confidence

Firmware version 24.44.3 or later

  1. Check the current firmware version of the Tesla Wall Connector via the Tesla app or device web interface
  2. Access the Wall Connector admin settings through the Tesla app or connected device interface
  3. Navigate to the firmware update or device settings section
  4. Initiate a firmware update to install the latest available version
  5. Confirm the firmware update completes successfully
  6. Verify the updated firmware version is 24.44.3 or later to confirm the vulnerability is addressed

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Wall Connector Firmware Scoped from the published advisory
  • Consultation8.0 h
  • Implementation24.0 h
  • Testing16.0 h
  • Review / QA8.0 h
56.0 hours of engineering $9,760
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-8321 in production — separate from our analysis above.

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What this is

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.

What belongs here
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  • Version or environment caveats, and links to real fixes
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