CVE-2020-3560: Cisco Access Points

High severity, CVSS 8.6. EPSS: 1.4% chance of exploitation in the next 30 days.

A vulnerability in Cisco Aironet Access Points (APs) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) on an affected device. The vulnerability is due to improper resource management while processing specific packets. An attacker could exploit this vulnerability by sending a series of crafted UDP packets to a specific port on an affected device. A successful exploit could either allow the attacker to tear down the connection between the AP and the wireless LAN controller, resulting in the affected device not being able to process client traffic, or cause the vulnerable device to reload, triggering a DoS condition. After the attack, the affected device should automatically recover its normal functions without manual intervention.

Affected products

• Cisco Access Points: before 16.12.4a (fixed in 16.12.4a)
• Cisco Aironet Access Point Software: version 8.5(154.27) only; version 8.8(125.0) only; version 8.10(105.0) only; version 8.10(105.4) only; version 17.1.2.6 only; version 17.1.2.9 only; …
• Cisco Business Access Points: from 10.0, before 10.1.1.0 (fixed in 10.1.1.0)
• Cisco Wireless Lan Controller: from 8.9, before 8.10.112.0 (fixed in 8.10.112.0)
• Cisco Wireless Lan Controller Software: before 8.5.161.0 (fixed in 8.5.161.0); from 8.6, before 8.8.130.0 (fixed in 8.8.130.0)

Published 2020-09-24. Last modified 2026-06-17.