WLC型號：AIR-CT5508-500-K9
WLC IOS版本：7.4.121
故障現象：Web界面無法登錄WLC
As we discussed over the phone, we found the following errormessage in the log, which indicates it might hit the below bug.
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuq97267/?reffering_site=dumpcr
==WLC故障出錯信息==
Mar 22 09:14:12.559: [ERROR] ewmain.c 5379: emweb internal error -handle not in Handle table
Mar 22 09:14:12.559: [ERROR] ewmain.c 2931: EmWeb: Handle tableoverflow @2931
Mar 22 09:14:02.997: [ERROR] ewmain.c 5379: emweb internal error -handle not in Handle table
Mar 22 09:14:02.997: [ERROR] ewmain.c 2931: EmWeb: Handle tableoverflow @2931
The bug has been fixed from the 7.6 and 8.0 version. But 7.6version has been deferred from the CCO and not recommended, so we may considerthe latest 8.0 version.（廠家建議升級成8.0以上的版本）
BTW:there is an Management Interface DoS Vulnerability of the7.4.121.0 version. Pls refer the blow link for details.
it’s suggest to upgrade to prevent this Vulnerability.
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCun86747/?reffering_site=dumpcr