CVE-2023-20056: Cisco Aironet Access Point Software

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Cisco Aironet Access Point Software: before 17.9.0.135 (fixed in 17.9.0.135)
• Cisco IOS XE: before 16.12.8 (fixed in 16.12.8); from 17.1, before 17.3.6 (fixed in 17.3.6); from 17.4, before 17.6.5 (fixed in 17.6.5); from 17.7, before 17.9.2 (fixed in 17.9.2)
• Cisco Wireless Lan Controller Software: before 8.10.183.0 (fixed in 8.10.183.0)

Published 2023-03-23. Last modified 2026-06-17.