# CVE-2021-1610: Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Web Management Vulnerabilities

> Attackers can execute arbitrary code or cause denial of service on Cisco Small Business RV series routers via the web management interface.

- **Severity:** Critical 9.8 (`CVSS:3.1/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:** 4 Aug 2021
- **Updated:** 7 Nov 2024
- **Also known as:** GHSA-phrf-jr8w-rqw5

## What is CVE-2021-1610?

CVE-2021-1610 is a critical memory corruption vulnerability in Cisco Small Business RV Series Router Firmware, published on 4 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Multiple vulnerabilities in the web-based management interface of the Cisco Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an attacker to do the following: Execute arbitrary code Cause a denial of service (DoS) condition Execute arbitrary commands For more information about these vulnerabilities, see the Details section of this advisory.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2021-1610?

It affects 1 product.


Products: Cisco Small Business Rv Series Router Firmware.

## How do I fix CVE-2021-1610?

No fix has been published for CVE-2021-1610 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-1610 being exploited?

There is no known exploitation of CVE-2021-1610 in the wild and no public exploit code.

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

- [CVE-2021-1609](https://insights.sbomify.com/CVE-2021-1609/): Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Web Management Vulnerabilities (critical 9.8)
- [CVE-2021-1602](https://insights.sbomify.com/CVE-2021-1602/): Cisco Small Business RV160 and RV260 Series VPN Routers Remote Command Execution Vulnerability (high 8.2)
- [CVE-2017-6620](https://insights.sbomify.com/CVE-2017-6620/): Auth bypass in Cisco CVR100W Wireless-N VPN Router (medium 5.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-1610 and fix it if it is affected.

What it is: CVE-2021-1610 is a critical memory corruption vulnerability in Cisco Small Business RV Series Router Firmware, published on 4 Aug 2021. 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-2021-1610 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-2021-1610/ (Markdown: https://insights.sbomify.com/CVE-2021-1610/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-1610
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-1610
- OSV: https://osv.dev/vulnerability/CVE-2021-1610

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-1610/
Summaries are generated and may contain mistakes; the official description above is the record.