CWE
20
Advisory Published
Updated

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

First published: Thu Apr 18 2019(Updated: )

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.

Credit: ykramarz@cisco.com ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Aironet Access Point Firmware
Cisco Aironet 1562d
Cisco Aironet 1562e
Cisco Aironet 1562i
Cisco Aironet 2800e
Cisco Aironet 2800i
Cisco Aironet 3800e
Cisco Aironet 3800i
Cisco Aironet 3800p
Cisco Aironet 4800
Cisco Aironet Access Point Firmware=8.5\(131.3\)
Cisco Aironet 1850e
Cisco Aironet 1850i
All of
Cisco Aironet Access Point Firmware
Any of
Cisco Aironet 1562d
Cisco Aironet 1562e
Cisco Aironet 1562i
Cisco Aironet 2800e
Cisco Aironet 2800i
Cisco Aironet 3800e
Cisco Aironet 3800i
Cisco Aironet 3800p
Cisco Aironet 4800
All of
Cisco Aironet Access Point Firmware=8.5\(131.3\)
Any of
Cisco Aironet 1850e
Cisco Aironet 1850i

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Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID for this vulnerability is CVE-2019-1826.

  • What is the severity of CVE-2019-1826?

    The severity of CVE-2019-1826 is medium with a severity value of 5.7.

  • Which software is affected by CVE-2019-1826?

    The Cisco Aironet Series Access Points (APs) with Cisco Aironet Access Point Firmware are affected by CVE-2019-1826.

  • How can an attacker exploit CVE-2019-1826?

    An authenticated, adjacent attacker can exploit CVE-2019-1826 by causing a denial of service (DoS) condition on an affected device.

  • Is there a fix available for CVE-2019-1826?

    Yes, Cisco has released a security advisory with fixes for CVE-2019-1826. Please refer to the Cisco Security Advisory for more information.

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