# CVE-2016-4863: Auth bypass in FlashAir Class 6 model

> Attackers on the local network can access files without authentication when Internet pass-thru Mode is enabled on Toshiba FlashAir SD cards.

- **Severity:** Medium 4.3 (`CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **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:** 22 May 2017
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-7wrq-vm6c-6qvc

## What is CVE-2016-4863?

CVE-2016-4863 is a medium-severity authentication bypass vulnerability in Toshiba FlashAir Class 6 model, published on 22 May 2017. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The Toshiba FlashAir SD-WD/WC series Class 6 model with firmware version 1.00.04 and later, FlashAir SD-WD/WC series Class 10 model W-02 with firmware version 2.00.02 and later, FlashAir SD-WE series Class 10 model W-03, FlashAir Class 6 model with firmware version 1.00.04 and later, FlashAir II Class 10 model W-02 series with firmware version 2.00.02 and later, FlashAir III Class 10 model W-03 series, FlashAir Class 6 model with firmware version 1.00.04 and later, FlashAir W-02 series Class 10 model with firmware version 2.00.02 and later, FlashAir W-03 series Class 10 model does not require authentication on accepting a connection from STA side LAN when "Internet pass-thru Mode" is enabled, which allows attackers with access to STA side LAN can obtain files or data.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2016-4863?

It affects 1 product.


Products: Toshiba Flashair.

## How do I fix CVE-2016-4863?

No fix has been published for CVE-2016-4863 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-4863 being exploited?

There is no known exploitation of CVE-2016-4863 in the wild and no public exploit code.

## Other vulnerabilities in Toshiba FlashAir Class 6 model

- [CVE-2017-2149](https://insights.sbomify.com/CVE-2017-2149/): Other in Installer for SDHC Memory Card with embedded TransferJetTM functionality Configuration Software (high 8.8)
- [CVE-2017-2162](https://insights.sbomify.com/CVE-2017-2162/): Hardcoded credentials in FlashAirTM SDHC Memory Card (SD-WD/WC Series <W-02>) (medium 4.3)
- [CVE-2017-2161](https://insights.sbomify.com/CVE-2017-2161/): Missing authorization in FlashAirTM SDHC Memory Card (SD-WD/WC Series <W-02>) (low 3.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-4863 and fix it if it is affected.

What it is: CVE-2016-4863 is a medium-severity authentication bypass vulnerability in Toshiba FlashAir Class 6 model, published on 22 May 2017. 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-2016-4863 in the wild and no public exploit code.

Affected product: Toshiba FlashAir Class 6 model. 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-2016-4863/ (Markdown: https://insights.sbomify.com/CVE-2016-4863/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-4863
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-4863
- OSV: https://osv.dev/vulnerability/CVE-2016-4863

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From sbomify Insights: https://insights.sbomify.com/CVE-2016-4863/
Summaries are generated and may contain mistakes; the official description above is the record.