The remote host is missing an update to the system as announced in the referenced advisory.
The following packages are affected: linux-opera opera-devel opera
CVE-2005-3750 Opera before 8.51 on Linux and Unix systems allows remote attackers to execute arbitrary code via shell metacharacters (backticks) in a URL that another product provides in a command line argument when launching Opera.
Solution: Update your system with the appropriate patches or software upgrades.