# CVE-2021-1181: Command injection in Cisco Small Business RV Series Router Firmware

> Authenticated attackers can execute arbitrary code as root or cause denial of service on Cisco Small Business Routers via crafted HTTP requests.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Jan 2021
- **Updated:** 12 Nov 2024
- **Also known as:** GHSA-fv5w-mvmp-j2mj

## What is CVE-2021-1181?

CVE-2021-1181 is a high-severity command injection vulnerability in Cisco Rv110w Firmware, published on 13 Jan 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. The vulnerabilities are due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a denial of service (DoS) condition. To exploit these vulnerabilities, an attacker would need to have valid administrator credentials on the affected device. Cisco has not released software updates that address these vulnerabilities.

Weakness: CWE-787 (Out-of-bounds Write), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2021-1181?

It affects 4 products.


Products: Cisco Rv110w Firmware, Cisco Rv130 Firmware, Cisco Rv130w Firmware, Cisco Rv215w Firmware.

## How do I fix CVE-2021-1181?

No fix has been published for CVE-2021-1181 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-1181 being exploited?

There is no known exploitation of CVE-2021-1181 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Rv110w Firmware

- [CVE-2022-20825](https://insights.sbomify.com/CVE-2022-20825/): Command injection in Cisco Small Business RV Series Router Firmware (critical 9.8)
- [CVE-2021-1459](https://insights.sbomify.com/CVE-2021-1459/): Command injection in Cisco Small Business RV Series Router Firmware (critical 9.8)
- [CVE-2020-3144](https://insights.sbomify.com/CVE-2020-3144/): Cisco RV110W, RV130, RV130W, and RV215W Routers Authentication Bypass Vulnerability (critical 9.8)
- [CVE-2019-1663](https://insights.sbomify.com/CVE-2019-1663/): Cisco RV110W, RV130W, and RV215W Routers Management Interface Remote Command Execution Vulnerability (critical 9.8)
- [CVE-2018-0425](https://insights.sbomify.com/CVE-2018-0425/): Cisco RV110W, RV130W, and RV215W Routers Management Interface Information Disclosure Vulnerability (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-1181 and fix it if it is affected.

What it is: CVE-2021-1181 is a high-severity command injection vulnerability in Cisco Rv110w Firmware, published on 13 Jan 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-1181 in the wild and no public exploit code.

Affected product: Cisco Rv110w 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-2021-1181/ (Markdown: https://insights.sbomify.com/CVE-2021-1181/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-1181
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-1181
- OSV: https://osv.dev/vulnerability/CVE-2021-1181

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-1181/
Summaries are generated and may contain mistakes; the official description above is the record.