---
id: "CVE-2023-20118"
kind: "vulnerability"
aliases: ["CVE-2023-20118"]
title: "A vulnerability in the web-based management interface of Cisco Small Business Routers RV016, RV042, RV042G, RV082,\u2026"
severity: "high"
cvss: 7.2
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Cisco Small Business RV Series Routers", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "cisco rv016 firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "cisco rv042 firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "cisco rv042g firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "cisco rv082 firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "cisco rv320 firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "cisco rv325 firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["cisco", "exploited", "infrastructure", "rv-series-router", "small-business-network"]
not_affected_if: ["no-rv-series-router", "web-management-disabled"]
published_at: "2023-04-13T07:15:21+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:05+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-20118", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-20118", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# A vulnerability in the web-based management interface of Cisco Small Business Routers RV016, RV042, RV042G, RV082,…

Multiple Cisco Small Business RV Series routers have a command injection flaw in the web management interface. An authenticated remote attacker can run commands as root and reach unauthorized data.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Cisco Small Business RV Series Routers affected ? fixed ?
- vendor:cisco rv016 firmware affected ? fixed ?
- vendor:cisco rv042 firmware affected ? fixed ?
- vendor:cisco rv042g firmware affected ? fixed ?
- vendor:cisco rv082 firmware affected ? fixed ?
- vendor:cisco rv320 firmware affected ? fixed ?
- vendor:cisco rv325 firmware affected ? fixed ?

## Fix

Apply the mitigations in Cisco's vendor advisory, or discontinue use of the device if no mitigation is available (per CISA KEV required action).

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-20118
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-20118

## From the sources

A vulnerability in the web-based management interface of Cisco Small Business Routers RV016, RV042, RV042G, RV082, RV320, and RV325 Routers could allow an authenticated, remote attacker to execute arbitrary commands on an affected device.

 This vulnerability is due to improper validation of user input within incoming HTTP packets. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web-based management interface. A successful exploit could allow the attacker to gain root-level privileges and access unauthorized data. To exploit this vulnerability, an attacker would need to have valid administrative credentials on the affected device.

 Cisco has not and will not release software updates that address this vulnerability.   However, administrators may disable the affected feature as described in the Workarounds ["#workarounds"] section.

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