CVE Vulnerabilities


Buffer Over-read

Published: Mar 24, 2021 | Modified: Nov 07, 2023
CVSS 3.x
CVSS 2.x
7.8 HIGH

A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition of an affected device. The vulnerability is due to insufficient validation of CAPWAP packets. An attacker could exploit this vulnerability by sending a malformed CAPWAP packet to an affected device. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition.


The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

Affected Software

Name Vendor Start Version End Version
Ios_xe Cisco 16.10.1 16.10.1
Ios_xe Cisco 16.10.1e 16.10.1e
Ios_xe Cisco 16.10.1s 16.10.1s
Ios_xe Cisco 16.11.1 16.11.1
Ios_xe Cisco 16.11.1a 16.11.1a
Ios_xe Cisco 16.11.1b 16.11.1b
Ios_xe Cisco 16.11.1c 16.11.1c
Ios_xe Cisco 16.11.2 16.11.2
Ios_xe Cisco 16.12.1 16.12.1
Ios_xe Cisco 16.12.1s 16.12.1s
Ios_xe Cisco 16.12.1t 16.12.1t
Ios_xe Cisco 16.12.2s 16.12.2s
Ios_xe Cisco 16.12.2t 16.12.2t
Ios_xe Cisco 16.12.3 16.12.3
Ios_xe Cisco 16.12.3s 16.12.3s
Ios_xe Cisco 16.12.4 16.12.4
Ios_xe Cisco 16.12.4a 16.12.4a
Ios_xe Cisco 17.1.1 17.1.1
Ios_xe Cisco 17.1.1s 17.1.1s
Ios_xe Cisco 17.1.1t 17.1.1t
Ios_xe Cisco 17.1.2 17.1.2
Ios_xe Cisco 17.2.1 17.2.1
Ios_xe Cisco 17.2.1a 17.2.1a
Ios_xe Cisco 17.2.3 17.2.3
Ios_xe Cisco 17.3.1 17.3.1