The remote host may be tricked into running an executable file.
The remote host is running a version of Yahoo! Messenger that is reported vulnerable to a remote file extension spoofing flaw. Specifically, if a user sends a malformed download query that includes many '~@' sequences, the displayed name of the file will obfuscate the true file type. An attacker can use this flaw to trick users into downloading files that they believe are not malicious. Successful exploitation might lead to the attacker executing arbitrary executables on the target system.
Upgrade to a version higher than 126.96.36.1993.