{"cve":"CVE-2022-20728","nvd":{"published":"2022-09-30T19:15:10.903","modified":"2026-06-17T04:24:57.837","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","score":4.7},"cwes":["CWE-284"],"references":["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apvlan-TDTtb4FY","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apvlan-TDTtb4FY"],"products":["cisco:aironet_1542d_firmware","cisco:aironet_1542i_firmware","cisco:aironet_1562d_firmware","cisco:aironet_1562e_firmware","cisco:aironet_1562i_firmware","cisco:aironet_1815i_firmware","cisco:aironet_1815m_firmware","cisco:aironet_1815t_firmware","cisco:aironet_1815w_firmware","cisco:aironet_1830_firmware","cisco:aironet_1840_firmware","cisco:aironet_1850e_firmware","cisco:aironet_1850i_firmware","cisco:aironet_2800e_firmware","cisco:aironet_2800i_firmware","cisco:aironet_3800e_firmware","cisco:aironet_3800i_firmware","cisco:aironet_3800p_firmware","cisco:aironet_4800_firmware","cisco:catalyst_9105ax_firmware","cisco:catalyst_9115ax_firmware","cisco:catalyst_9117ax_firmware","cisco:catalyst_9120ax_firmware","cisco:catalyst_9124ax_firmware","cisco:catalyst_9130ax_firmware","cisco:catalyst_iw6300_firmware"],"source":"nvd","synced_at":"2026-10-19T21:36:05.460296998+00:00"},"epss":{"cve":"CVE-2022-20728","score":0.00267,"percentile":0.18857,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}