# CVE-2020-3330: Cisco Small Business RV110W Wireless-N VPN Firewall Static Default Credential Vulnerability

> An unauthenticated remote attacker can gain full control of the Cisco RV110W router by using a static default password for the Telnet service.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Jul 2020
- **Updated:** 15 Nov 2024
- **Also known as:** GHSA-6925-92m9-84w6

## What is CVE-2020-3330?

CVE-2020-3330 is a critical vulnerability in Cisco RV110W Wireless-N VPN Firewall Firmware, published on 16 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the Telnet service of Cisco Small Business RV110W Wireless-N VPN Firewall Routers could allow an unauthenticated, remote attacker to take full control of the device with a high-privileged account. The vulnerability exists because a system account has a default and static password. An attacker could exploit this vulnerability by using this default account to connect to the affected system. A successful exploit could allow the attacker to gain full control of an affected device.

Weakness: CWE-798 (Use of Hard-coded Credentials)

## Which versions are affected by CVE-2020-3330?

It affects 1 product.


Products: Cisco Rv110w Wireless-N Vpn Firewall Firmware.

## How do I fix CVE-2020-3330?

No fix has been published for CVE-2020-3330 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-3330 being exploited?

There is no known exploitation of CVE-2020-3330 in the wild and no public exploit code.

## Other vulnerabilities in Cisco RV110W Wireless-N VPN Firewall Firmware

- [CVE-2020-3323](https://insights.sbomify.com/CVE-2020-3323/): Command injection in Cisco Small Business RV Series Router Firmware (critical 9.8)
- [CVE-2020-3331](https://insights.sbomify.com/CVE-2020-3331/): Cisco RV110W and RV215W Series Routers Arbitrary Code Execution Vulnerability (critical 9.8)
- [CVE-2016-1395](https://insights.sbomify.com/CVE-2016-1395/): Command injection in n/a (critical 9.8)
- [CVE-2020-3146](https://insights.sbomify.com/CVE-2020-3146/): Cisco RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution Multiple Vulnerabilities (high 8.8)
- [CVE-2015-6397](https://insights.sbomify.com/CVE-2015-6397/): Privilege escalation in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-3330 and fix it if it is affected.

What it is: CVE-2020-3330 is a critical vulnerability in Cisco RV110W Wireless-N VPN Firewall Firmware, published on 16 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-3330 in the wild and no public exploit code.

Affected product: Cisco RV110W Wireless-N VPN Firewall Firmware. 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-2020-3330/ (Markdown: https://insights.sbomify.com/CVE-2020-3330/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-3330
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3330
- OSV: https://osv.dev/vulnerability/CVE-2020-3330

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-3330/
Summaries are generated and may contain mistakes; the official description above is the record.