---
id: CVE-2024-20271
title: Cisco Access Point Software Denial of Service Vulnerability (CVE-2024-20271)
summary: "A vulnerability in the IP packet processing of Cisco Access Point (AP) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to insufficien…"
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
affected:
  - aironet_access_point_software
  - business_wireless_access_point_software
  - aironet_access_point_software_ios_xe_controller
published: '2024-03-27'
updated: '2024-03-27'
sourceUpdated: '2024-03-27T16:00:00+00:00'
source: CSAF
sourceUrl: >-
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-dos-h9TGGX6W
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-dos-h9TGGX6W
  - url: 'https://software.cisco.com'
tags:
  - csaf
  - vendor-advisory
  - cisco
epss: 0.00633
epssPercentile: 0.48997
ingestedAt: '2026-09-08T15:58:18.543Z'
---

## Overview

A vulnerability in the IP packet processing of Cisco Access Point (AP) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

This vulnerability is due to insufficient input validation of certain IPv4 packets. An attacker could exploit this vulnerability by sending a crafted IPv4 packet either to or through an affected device. A successful exploit could allow the attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. To successfully exploit this vulnerability, the attacker does not need to be associated with the affected AP. This vulnerability cannot be exploited by sending IPv6 packets.

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

## Vendor advisories

- **cisco-sa-ap-dos-h9TGGX6W** · Cisco · affected: Cisco Aironet Access Point Software, Cisco Business Wireless Access Point Software, Cisco Aironet Access Point Software (IOS XE Controller) · updated 2024-03-27 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-dos-h9TGGX6W)

**Cisco Access Point Software Denial of Service Vulnerability**. Released 2024-03-27.

Affected:

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

## Remediation

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