Summary
The remote host is missing an update to the system as announced in the referenced advisory.
Solution
Update your system with the appropriate patches or software upgrades.
http://forums.cacti.net/about25749.html
http://www.vuxml.org/freebsd/dea7df85-d96c-11dc-9bfc-000e0c092e7a.html
Insight
The following package is affected: cacti