Intruders can send spam to the Internet through the guest VLAN.

Peer-to-peer attacks can still be conducted between guest users unless application-layer monitoring and filtering are implemented.

Unauthorized users can perform Internet-based network attacks through the WLAN.

Guest users can reconfigure AP radios servicing the guest VLAN unless unsecure network management protocols (e.g. Telnet, HTTP) are blocked.

Once guest users are associated to the WLAN, they can capture 802.11 frames from the corporate VLANs.