CVE-2018-0442: Cisco Wireless Lan Controller Software

High severity, CVSS 7.5. EPSS: 3.3% chance of exploitation in the next 30 days.

A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol component of Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, remote attacker to retrieve memory contents, which could lead to the disclosure of confidential information. The vulnerability is due to insufficient condition checks in the part of the code that handles CAPWAP keepalive requests. An attacker could exploit this vulnerability by sending a crafted CAPWAP keepalive packet to a vulnerable Cisco WLC device. A successful exploit could allow the attacker to retrieve the contents of device memory, which could lead to the disclosure of confidential information.

Affected products

• Cisco Wireless Lan Controller Software: before 8.2.170.0 (fixed in 8.2.170.0); from 8.3, before 8.3.140.0 (fixed in 8.3.140.0); from 8.4, before 8.5.110.0 (fixed in 8.5.110.0); from 8.6, before 8.6.101.0 (fixed in 8.6.101.0); from 8.7, before 8.7.102.0 (fixed in 8.7.102.0)

Published 2018-10-17. Last modified 2026-06-17.