CVE-2019-1826 Cisco Aironet Series Access Points Quality of Service Denial of Service Vulnerability

Medium 6.8 Published 18 Apr 2019 Updated 21 Nov 2024

An authenticated adjacent attacker can crash Cisco Aironet Access Points by sending malformed Wi-Fi frames, causing a denial of service.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-1826?

CVE-2019-1826 is a medium-severity denial of service vulnerability in Cisco Aironet Access Point Software, published on 18 Apr 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the quality of service (QoS) feature of Cisco Aironet Series Access Points (APs) could allow an authenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper input validation on QoS fields within Wi-Fi frames by the affected device. An attacker could exploit this vulnerability by sending malformed Wi-Fi frames to an affected device. A successful exploit could allow the attacker to cause the affected device to crash, resulting in a DoS condition.

Weakness: CWE-20

Which versions are affected by CVE-2019-1826?

It affects 1 product.

Products include Cisco Aironet Access Point Firmware.

How do I fix CVE-2019-1826?

No fix has been published for CVE-2019-1826 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-1826 being exploited?

There is no known exploitation of CVE-2019-1826 in the wild and no public exploit code.

Sources

Also known as GHSA-72jx-gchv-4v87.