Cisco Aironet 1800, 2800, and 3800 Series Access Point Platforms ARP Request Handling Denial of Service Vulnerability

CVE number – CVE-2016-1419

A vulnerability exists in Cisco Access Point (AP) platforms when processing Address Resolution Protocol (ARP) packets that could allow an unauthenticated, adjacent attacker to inject crafted entries into the ARP table and eventually cause a reload of the affected device.

The vulnerability is due to improper processing of illegal ARP packets. An attacker could exploit this vulnerability by sending crafted ARP packets to be processed by an affected device. An exploit could allow the attacker to inject crafted entries in the ARP table and eventually cause a reload of the device.

Cisco has released software updates that address this vulnerability. Workarounds that address this vulnerability are not available.

This advisory is available at the following link:

Affected Products
  • Vulnerable Products

    Cisco Aironet 1800, 2800, and 3800 AP platforms running software versions prior to the first fixed version of or are vulnerable.

    Products Confirmed Not Vulnerable

    No other Cisco products are currently known to be affected by this vulnerability.

  • Workarounds that address this vulnerability are not available.
Fixed Software
  • Cisco provides information about fixed software in Cisco bugs, which are accessible through the Cisco Bug Search Tool.

    When considering software upgrades, customers are advised to consult the Cisco Security Advisories and Responses archive at and review subsequent advisories to determine exposure and a complete upgrade solution.

    In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.

Exploitation and Public Announcements
  • The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

Duncan Newell

Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.

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