---
id: CVE-2022-20622
title: Cisco Aironet Access Points ICMP Denial of Service Vulnerability
summary: >-
  A vulnerability in IP ingress packet processing of the Cisco Embedded Wireless
  Controller with Catalyst Access Points Software could allow an
  unauthenticated, remote attacker to cause the device to reload unexpectedly,
  causing a denial of …
severity: high
cvss: 8.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H'
cvssSource: vendor
vendor: Cisco
product: Cisco Aironet Access Point Software (IOS XE Controller)
affected:
  - aironet_access_point_software_ios_xe_controller
  - aironet_access_point_software
published: '2022-04-13'
updated: '2022-04-13'
sourceUpdated: '2022-04-13T16:00:00+00:00'
source: CSAF
sourceUrl: >-
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-ip-flood-dos-6hxxENVQ
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-ip-flood-dos-6hxxENVQ
  - url: 'https://software.cisco.com'
tags:
  - csaf
  - vendor-advisory
  - cisco
epss: 0.01386
epssPercentile: 0.71052
ingestedAt: '2026-09-08T15:58:18.538Z'
---

## Overview

A vulnerability in IP ingress packet processing of the Cisco Embedded Wireless Controller with Catalyst Access Points Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, causing a denial of service (DoS) condition. The device may experience a performance degradation in traffic processing or high CPU usage prior to the unexpected reload.

This vulnerability is due to improper rate limiting of IP packets to the management interface. An attacker could exploit this vulnerability by sending a steady stream of IP traffic at a high rate to the management interface of the affected device. A successful exploit could allow the attacker to cause the device to reload.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

## Vendor advisories

- **cisco-sa-ap-ip-flood-dos-6hxxENVQ** · Cisco · affected: Cisco Aironet Access Point Software (IOS XE Controller), Cisco Aironet Access Point Software · updated 2022-04-13 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-ip-flood-dos-6hxxENVQ)

**Cisco Embedded Wireless Controller with Catalyst Access Points IP Flood Denial of Service Vulnerability**. Released 2022-04-13.

Affected:

- Cisco Aironet Access Point Software (IOS XE Controller)
- Cisco Aironet Access Point Software

## Remediation

Cisco has released software updates that address this vulnerability. https://software.cisco.com