---
id: "CVE-2022-20699"
kind: "vulnerability"
aliases: ["CVE-2022-20699"]
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: 0.72458
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", "rv160", "rv260", "rv340", "rv345", "small-business-router"]
not_affected_if: ["fully-patched-firmware", "other-cisco-models"]
published_at: "2022-02-10T18:15:08+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-2022-20699", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2022-20699", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-20699", "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

A stack-based buffer overflow in Cisco Small Business RV160, RV260, RV340, and RV345 routers lets an attacker run arbitrary code or commands on the device. CISA lists it as actively exploited in the wild.

_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 ?

## How to check

Check the firmware version on each router (admin web UI or CLI 'show version') and compare it with the fixed release in the Cisco advisory. unknown

## Fix

Apply the firmware update per the Cisco vendor advisory; the fixed version is not stated in the sources. Replace or isolate unpatched routers that remain exposed to the internet.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-20699
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2022-20699
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2022-20699

## 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_