With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
lldpXMedRemFirmwareRev
lldp X Med Remote Firmware Rev
1.0.8802.1.1.2.1.5.4795.1.3.3.1.2
The vendor-specific firmware revision string as advertised by the remote endpoint.
Back to LLDP-EXT-MED-MIB MIB page.
IPHost Network monitor allows you to monitor lldpXMedRemFirmwareRev on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.