# CVE-2025-8321: Tesla Wall Connector Firmware Downgrade Vulnerability

> Physically present attackers can bypass anti-downgrade protections to install vulnerable firmware and execute arbitrary code on Tesla Wall Connectors.

- **Severity:** Medium 6.8 (`CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Jul 2025
- **Updated:** 30 Jul 2025
- **Also known as:** GHSA-mccj-pq5m-h2mp

## What is CVE-2025-8321?

CVE-2025-8321 is a medium-severity vulnerability in Tesla Wall Connector, published on 30 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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.

Weakness: CWE-1328 (Security Version Number Mutable to Older Versions)

## Which versions are affected by CVE-2025-8321?

It affects 1 product.


Products: Tesla Wall Connector Firmware.

## How do I fix CVE-2025-8321?

No fix has been published for CVE-2025-8321 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-8321 being exploited?

There is no known exploitation of CVE-2025-8321 in the wild and no public exploit code.

## Other vulnerabilities in Tesla Wall Connector

- [CVE-2025-8320](https://insights.sbomify.com/CVE-2025-8320/): Tesla Wall Connector Content-Length Header Improper Input Validation Remote Code Execution Vulnerability (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-8321 and fix it if it is affected.

What it is: CVE-2025-8321 is a medium-severity vulnerability in Tesla Wall Connector, published on 30 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-8321 in the wild and no public exploit code.

Affected product: Tesla Wall Connector. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-8321/ (Markdown: https://insights.sbomify.com/CVE-2025-8321/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-8321
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-8321
- OSV: https://osv.dev/vulnerability/CVE-2025-8321

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-8321/
Summaries are generated and may contain mistakes; the official description above is the record.