CVE-2025-8320
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 · uneditedTesla Wall Connector Content-Length Header Improper Input Validation Remote Code Execution Vulnerability. This vulnerability allows network-adjacent 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 parsing of the HTTP Content-Length header. The issue results from the lack of proper validation of user-supplied data, which can result in memory access past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-26300.
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 confidenceTesla Wall Connector devices contain an improper input validation vulnerability in the parsing of HTTP Content-Length headers. The lack of proper validation of user-supplied data allows memory access past the end of an allocated buffer, enabling an unauthenticated, network-adjacent attacker to execute arbitrary code in the device context.
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< 24.44.3CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:A/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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Locate the Tesla Wall Connector firmware versionAccess the device's web administration interface (typically at its IP address on the local network) and navigate to the About, System Information, or Settings section to find the firmware version displayAffected if The displayed firmware version is lower than 24.44.3 (for example, 24.36.0, 24.12.2, etc.)
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Alternative firmware version check via Tesla mobile appOpen the Tesla app, select the Wall Connector from your vehicles or devices, and look for firmware/version information in the device details or settingsAffected if The app reports a firmware version below 24.44.3
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Confirm network HTTP service is accessibleAttempt to access the Wall Connector's HTTP interface by browsing to its IP address on port 80 or 443Affected if The device responds to HTTP requests (the vulnerability requires the HTTP service to be running, which is default)
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Check for HTTP header handling exposureSend a crafted HTTP request with an abnormally large or malformed Content-Length header value to the device's web interfaceAffected if The device accepts the request without rejecting the invalid Content-Length (this is the vulnerable condition)
The environment is affected if the Tesla Wall Connector firmware version is below 24.44.3 and the device's HTTP management interface is 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 · scoped24.44.3
Apply firmware updates from Tesla when available; meanwhile, isolate Tesla Wall Connector devices on a restricted network segment and block external access to their management interfaces.
24.44.3 or later
- Identify all Tesla Wall Connector devices on the network that need to be remediated
- Access the admin interface or use the Tesla mobile app to check the current firmware version of each Wall Connector
- Download firmware version 24.44.3 or later from the official Tesla support channels
- Apply the firmware upgrade to each affected Wall Connector device following Tesla's official upgrade instructions
- Verify the upgrade was successful by confirming the firmware version is now 24.44.3 or higher
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-8320 — 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-2025-8320 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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