# CVE-2022-20842: Cisco Small Business RV Series Routers Vulnerabilities

> Unauthenticated remote attackers can execute arbitrary code or cause denial of service on Cisco Small Business RV Series Routers.

- **Severity:** Critical 9.0 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/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:** 10 Aug 2022
- **Updated:** 1 Nov 2024
- **Also known as:** GHSA-97p7-948q-cpjh

## What is CVE-2022-20842?

CVE-2022-20842 is a critical memory corruption vulnerability in Cisco Small Business RV Series Router Firmware, published on 10 Aug 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 unauthenticated, remote attacker to execute arbitrary code or cause a denial of service (DoS) condition on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

Weakness: CWE-20 (Improper Input Validation), CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2022-20842?

It affects 4 products.


Products: Cisco Rv340 Firmware, Cisco Rv340w Firmware, Cisco Rv345 Firmware, Cisco Rv345p Firmware.

## How do I fix CVE-2022-20842?

No fix has been published for CVE-2022-20842 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-20842 being exploited?

There is no known exploitation of CVE-2022-20842 in the wild and no public exploit code.

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

- [CVE-2022-20699](https://insights.sbomify.com/CVE-2022-20699/): Cisco Small Business RV Series Routers Stack-based Buffer Overflow (critical 10.0, exploited in the wild)
- [CVE-2022-20701](https://insights.sbomify.com/CVE-2022-20701/): Cisco Small Business RV Series Routers Stack-based Buffer Overflow (critical 10.0, exploited in the wild)
- [CVE-2022-20708](https://insights.sbomify.com/CVE-2022-20708/): Cisco Small Business RV Series Routers Stack-based Buffer Overflow (critical 10.0, exploited in the wild)
- [CVE-2022-20707](https://insights.sbomify.com/CVE-2022-20707/): Cisco Small Business RV Series Routers Vulnerabilities (critical 10.0)
- [CVE-2022-20709](https://insights.sbomify.com/CVE-2022-20709/): Cisco Small Business RV Series Routers Vulnerabilities (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-20842 and fix it if it is affected.

What it is: CVE-2022-20842 is a critical memory corruption vulnerability in Cisco Small Business RV Series Router Firmware, published on 10 Aug 2022. 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-2022-20842 in the wild and no public exploit code.

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-2022-20842/ (Markdown: https://insights.sbomify.com/CVE-2022-20842/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-20842
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-20842
- OSV: https://osv.dev/vulnerability/CVE-2022-20842

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-20842/
Summaries are generated and may contain mistakes; the official description above is the record.