# CVE-2021-4471: TG8 Firewall Unauthenticated User Password Disclosure

> Remote attackers can access unauthenticated directories on TG8 Firewalls to download stored user credentials, leading to data exposure and potential account takeover.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Nov 2025
- **Updated:** 17 Nov 2025
- **Also known as:** GHSA-c65r-5x48-pvc5

## What is CVE-2021-4471?

CVE-2021-4471 is a high-severity vulnerability in TG8 Firewall, published on 14 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

TG8 Firewall exposes a directory such as /data/ over HTTP without authentication. This directory stores credential files for previously logged-in users. A remote unauthenticated attacker can enumerate and download files within the directory to obtain valid account usernames and passwords, leading to loss of confidentiality and further unauthorized access.

Weakness: CWE-538 (Insertion of Sensitive Information into Externally-Accessible File or Directory)

## Which versions are affected by CVE-2021-4471?


## How do I fix CVE-2021-4471?

No fix has been published for CVE-2021-4471 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-4471 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-4471 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-4471 and fix it if it is affected.

What it is: CVE-2021-4471 is a high-severity vulnerability in TG8 Firewall, published on 14 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-4471 exists.

Affected product: TG8 Firewall. 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-2021-4471/ (Markdown: https://insights.sbomify.com/CVE-2021-4471/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-4471
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-4471
- OSV: https://osv.dev/vulnerability/CVE-2021-4471

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-4471/
Summaries are generated and may contain mistakes; the official description above is the record.