---
id: "CVE-2022-20700"
kind: "vulnerability"
aliases: ["CVE-2022-20700"]
title: "Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers: Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability"
severity: "critical"
cvss: 10.0
epss: 0.05655
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["cisco", "exploited", "infrastructure", "routers", "rv340", "rv345", "small-business"]
not_affected_if: ["unknown"]
published_at: "2022-02-10T18:15:09+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-20700", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2022-20700", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-20700", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers: Cisco Small Business RV Series Routers Stack-based Buffer Overflow Vulnerability

Cisco Small Business RV160, RV260, RV340 and RV345 routers have a stack-based buffer overflow in their web-based management interface. An attacker can run arbitrary code on the router, bypass authentication, or cause a denial of service.

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

## Affected

- vendor:Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers affected ? fixed ?

## Fix

Apply the Cisco firmware updates per vendor instructions; the sources do not name the fixed firmware version.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-20700
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2022-20700
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2022-20700

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_