CVE-2020-3262

HIGH

Cisco Wireless LAN Controller Firmware - Unauthenticated Denial of Service via CAPWAP Packet Handling

Title source: llm
STIX 2.1

Description

A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol handler of Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on 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 restart, resulting in a DoS condition.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0141
EPSS Percentile 80.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-20
Status published
Products (2)
cisco/5508_wireless_controller_firmware 8.8\(120.0\)
cisco/5520_wireless_controller_firmware 8.8\(120.0\)
Published Apr 15, 2020
Tracked Since Feb 18, 2026