CVE-2022-20728: Cisco Access Points VLAN Bypass from Native VLAN Vulnerability
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 Software
Event History
Frequently Asked Questions
What is CVE-2022-20728?
CVE-2022-20728 is a vulnerability in the client forwarding code of multiple Cisco Access Points (APs) that allows an unauthenticated, adjacent attacker to inject packets from the native VLAN to clients within nonnative VLANs.
How does CVE-2022-20728 affect Cisco Access Points?
CVE-2022-20728 affects multiple Cisco Access Points (APs) by allowing an attacker to inject packets from the native VLAN to clients within nonnative VLANs.
What is the severity of CVE-2022-20728?
CVE-2022-20728 has a severity rating of 4.7 out of 10, which is considered medium severity.
How can I fix CVE-2022-20728?
To fix CVE-2022-20728, Cisco has released a software update. Please refer to the Cisco Security Advisory for specific instructions.
Where can I find more information about CVE-2022-20728?
You can find more information about CVE-2022-20728 in the Cisco Security Advisory.