With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cd11IfVlanEncryptKeyConfigGroup
Cisco DOT11 Interfaces Vlan Encrypt Key Config Group
1.3.6.1.4.1.9.9.272.3.2.4
WEP key configuration for specific VLANs on IEEE 802.11 radio interface.
Back to CISCO-DOT11-IF-MIB MIB page.
IPHost Network monitor allows you to monitor cd11IfVlanEncryptKeyConfigGroup on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.