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.
Published 2022-09-30 19:15:11
Updated 2022-10-04 18:50:13
View at NVD,   CVE.org
Vulnerability category: BypassGain privilege

Exploit prediction scoring system (EPSS) score for CVE-2022-20728

Probability of exploitation activity in the next 30 days EPSS Score History
~ 15 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2022-20728

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
Cisco Systems, Inc.

CWE ids for CVE-2022-20728

  • The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
    Assigned by: ykramarz@cisco.com (Secondary)

References for CVE-2022-20728

Products affected by CVE-2022-20728

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