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CVE-2021-34740

HIGH CVSS: 7.4 Published: 2021-09-23 Modified: 2026-06-17

Description

A vulnerability in the WLAN Control Protocol (WCP) implementation for Cisco Aironet Access Point (AP) software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect error handling when an affected device receives an unexpected 802.11 frame. An attacker could exploit this vulnerability by sending certain 802.11 frames over the wireless network to an interface on an affected AP. A successful exploit could allow the attacker to cause a packet buffer leak. This could eventually result in buffer allocation failures, which would trigger a reload of the affected device.

Affected Platforms

Cisco 1100-8P Integrated Services RouterCisco Aironet 1542DCisco Aironet 1850Cisco Aironet 1562ICisco Aironet 1810WCisco Catalyst Iw6300 DcCisco 1101 Integrated Services RouterCisco Aironet 2800Cisco Aironet 2800ICisco Aironet 1810

Weakness Type

CWE-401, CWE-401

References