# CVE-2019-20004: Auth bypass in n/a

> Attackers can gain administrative control of Intelbras IWR 3000N routers by exploiting IP-based session persistence after a password change.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 5 Jan 2020
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-rhcg-23g7-7mxh

## What is CVE-2019-20004?

CVE-2019-20004 is a high-severity authentication bypass vulnerability in n/a, published on 5 Jan 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

An issue was discovered on Intelbras IWR 3000N 1.8.7 devices. When the administrator password is changed from a certain client IP address, administrative authorization remains available to any client at that IP address, leading to complete control of the router.

Weakness: CWE-640 (Weak Password Recovery Mechanism for Forgotten Password)

## Which versions are affected by CVE-2019-20004?

It affects 1 product.


Products: Intelbras Iwr 3000n Firmware.

## How do I fix CVE-2019-20004?

No fix has been published for CVE-2019-20004 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-20004 being exploited?

There is no known exploitation of CVE-2019-20004 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-19995](https://insights.sbomify.com/CVE-2019-19995/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2019-11414](https://insights.sbomify.com/CVE-2019-11414/): Auth bypass in n/a (high 8.8)
- [CVE-2019-11416](https://insights.sbomify.com/CVE-2019-11416/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2025-55976](https://insights.sbomify.com/CVE-2025-55976/): Information disclosure in n/a (high 8.4)
- [CVE-2019-19996](https://insights.sbomify.com/CVE-2019-19996/): Denial of service in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-20004 and fix it if it is affected.

What it is: CVE-2019-20004 is a high-severity authentication bypass vulnerability in n/a, published on 5 Jan 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-20004 in the wild and no public exploit code.

Affected product: n/a. 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-2019-20004/ (Markdown: https://insights.sbomify.com/CVE-2019-20004/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-20004
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-20004
- OSV: https://osv.dev/vulnerability/CVE-2019-20004

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-20004/
Summaries are generated and may contain mistakes; the official description above is the record.