This indicates an attack attempt to exploit an Information Disclosure Vulnerability in NEC Univerge Sv9100 WebPro.
The vulnerability is due to an design error in the vulnerable application when handling a maliciously crafted request. A remote attacker may be able to exploit this to get arbitrary files on the affected machine via a crafted request.
NEC Univerge Sv9100 WebPro version 6.00.00
Information Disclosure: Remote attackers can gain sensitive information from vulnerable systems.
Apply the latest patch from the vendor.