(1) snmp.php and (2) rrd.php in Cacti before 0.8.8b allows remote attackers to execute arbitrary commands via shell metacharacters in unspecified vectors.
http://www.openwall.com/lists/oss-security/2013/08/07/15
http://www.debian.org/security/2012/dsa-2739
http://svn.cacti.net/viewvc?view=rev&revision=7393
http://svn.cacti.net/viewvc?view=rev&revision=7392
http://secunia.com/advisories/54386
http://secunia.com/advisories/54181
http://lists.opensuse.org/opensuse-updates/2013-08/msg00053.html