---
id: CVE-2023-20056
title: Cisco Access Point Software Denial of Service
summary: "A vulnerability in the management CLI of Cisco access point (AP) software could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to insufficient input v…"
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/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: '2023-03-22'
updated: '2023-03-22'
sourceUpdated: '2023-03-22T16:00:00+00:00'
source: CSAF
sourceUrl: >-
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-cli-dos-tc2EKEpu
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-cli-dos-tc2EKEpu
  - url: 'https://software.cisco.com'
tags:
  - csaf
  - vendor-advisory
  - cisco
epss: 0.00257
epssPercentile: 0.15546
ingestedAt: '2026-09-08T15:58:18.543Z'
---

## Overview

A vulnerability in the management CLI of Cisco access point (AP) software could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device.

This vulnerability is due to insufficient input validation of commands supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command. A successful exploit could allow the attacker to cause an affected device to reload spontaneously, resulting in a DoS condition.

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

## Vendor advisories

- **cisco-sa-ap-cli-dos-tc2EKEpu** · Cisco · affected: Cisco Aironet Access Point Software (IOS XE Controller), Cisco Aironet Access Point Software · updated 2023-03-22 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ap-cli-dos-tc2EKEpu)

**Cisco Access Point Software Denial of Service Vulnerability**. Released 2023-03-22.

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