# CVE-2022-20703: Cisco Small Business RV Series Routers Stack-based Buffer Overflow

> Attackers can execute arbitrary code, elevate privileges, bypass authentication, and cause denial of service on Cisco Small Business RV Series Routers.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 3 Mar 2022 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Feb 2022
- **Updated:** 21 Oct 2025
- **Also known as:** GHSA-jpxp-6rp5-3wg3

## What is CVE-2022-20703?

CVE-2022-20703 is a critical vulnerability in Cisco Small Business RV Series Router Firmware, published on 10 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an attacker to do any of the following: Execute arbitrary code Elevate privileges Execute arbitrary commands Bypass authentication and authorization protections Fetch and run unsigned software Cause denial of service (DoS) For more information about these vulnerabilities, see the Details section of this advisory.

Weakness: CWE-295 (Improper Certificate Validation), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2022-20703?

It affects 9 products.


Products: Cisco Rv160 Firmware, Cisco Rv160w Firmware, Cisco Rv260 Firmware, Cisco Rv260p Firmware, Cisco Rv260w Firmware, Cisco Rv340 Firmware, Cisco Rv340w Firmware, Cisco Rv345 Firmware, Cisco Rv345p Firmware.

## How do I fix CVE-2022-20703?

No fix has been published for CVE-2022-20703 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Mar 2022.

## Is CVE-2022-20703 being exploited?

Yes. Attackers have exploited CVE-2022-20703 in the wild since at least 3 Mar 2022.

## Other vulnerabilities in Cisco Small Business RV Series Router Firmware

- [CVE-2022-20700](https://insights.sbomify.com/CVE-2022-20700/): Cisco Small Business RV Series Routers Stack-based Buffer Overflow (critical 10.0, exploited in the wild)
- [CVE-2022-20702](https://insights.sbomify.com/CVE-2022-20702/): Cisco Small Business RV Series Routers Vulnerabilities (critical 10.0)
- [CVE-2022-20704](https://insights.sbomify.com/CVE-2022-20704/): Cisco Small Business RV Series Routers Vulnerabilities (critical 10.0)
- [CVE-2022-20705](https://insights.sbomify.com/CVE-2022-20705/): Cisco Small Business RV Series Routers Vulnerabilities (critical 10.0)
- [CVE-2022-20706](https://insights.sbomify.com/CVE-2022-20706/): Cisco Small Business RV Series Routers Vulnerabilities (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-20703 and fix it if it is affected.

What it is: CVE-2022-20703 is a critical vulnerability in Cisco Small Business RV Series Router Firmware, published on 10 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2022-20703 in the wild since at least 3 Mar 2022.

Affected product: Cisco Small Business RV Series Router 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-2022-20703/ (Markdown: https://insights.sbomify.com/CVE-2022-20703/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-20703
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-20703
- OSV: https://osv.dev/vulnerability/CVE-2022-20703

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-20703/
Summaries are generated and may contain mistakes; the official description above is the record.