CVE-2020-3560: A vulnerability in Cisco Aironet Access Points (APs) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) on an affected...

Description

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.

Metrics

CVSS 3.1

8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Probability

1.42%

69.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Wireless Lan Controller	>= 8.9, < 8.10.112.0
Cisco	Wireless Lan Controller Software	< 8.5.161.0
Cisco	Wireless Lan Controller Software	>= 8.6, < 8.8.130.0
Cisco	Business Access Points	>= 10.0, < 10.1.1.0
Cisco	Access Points	< 16.12.4a
Cisco	Aironet Access Point Software	8.5\(154.27\)
Cisco	Aironet Access Point Software	8.8\(125.0\)
Cisco	Aironet Access Point Software	8.10\(105.0\)
Cisco	Aironet Access Point Software	8.10\(105.4\)
Cisco	Aironet Access Point Software	17.1.2.6
Cisco	Aironet Access Point Software	17.1.2.9
Cisco	Aironet Access Point Software	17.2.0.37

References

Timeline

Published: Sep 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-3560?

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.

How severe is CVE-2020-3560?

CVE-2020-3560 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 1.42% probability of exploitation in the next 30 days.

How do I fix CVE-2020-3560?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.