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CVE-2022-20728

MEDIUM CVSS: 4.7 Published: 2022-09-30 Modified: 2026-06-17

Description

A vulnerability in the client forwarding code of multiple Cisco Access Points (APs) could allow an unauthenticated, adjacent attacker to inject packets from the native VLAN to clients within nonnative VLANs on an affected device. This vulnerability is due to a logic error on the AP that forwards packets that are destined to a wireless client if they are received on the native VLAN. An attacker could exploit this vulnerability by obtaining access to the native VLAN and directing traffic directly to the client through their MAC/IP combination. A successful exploit could allow the attacker to bypass VLAN separation and potentially also bypass any Layer 3 protection mechanisms that are deployed.

Affected Platforms

Cisco Aironet 1542DCisco Aironet 1562I FirmwareCisco Aironet 1562ICisco Aironet 1815I FirmwareCisco Catalyst 9124AxCisco Aironet 2800ICisco Aironet 1850I FirmwareCisco Aironet 4800 FirmwareCisco Aironet 1840Cisco Aironet 1840 Firmware

Weakness Type

CWE-284, NVD-CWE-Other

References