This indicates an attack attempt against a Cross-Site Scripting vulnerability in D-Link DSL-2640B Firmware.
The vulnerability is caused by a lack of sanitizing of the "sysPassword" parameter that is passed to "redpass.cgi". It may allow remote attackers change the administrator password via a crafted request.
D-Link DSL-2640B EU_4.00
System Comprimise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue.