CVE-2022-20728

Cisco Access Points VLAN Bypass from Native VLAN Vulnerability

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.

Category

4.7
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory cisco.com
Affected: Cisco Cisco Aironet Access Point Software (IOS XE Controller)
Published at:
Updated at:

References

Link Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apvlan-TDTtb4FY vendor advisory

Frequently Asked Questions

What is the severity of CVE-2022-20728?
CVE-2022-20728 has been scored as a medium severity vulnerability.
How to fix CVE-2022-20728?
To fix CVE-2022-20728, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-20728 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-20728 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-20728?
CVE-2022-20728 affects Cisco Cisco Aironet Access Point Software (IOS XE Controller).
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