Security issues were identified and fixed in networkmanager:

GNOME NetworkManager before 0.8.6 does not properly enforce the
auth_admin element in PolicyKit, which allows local users to bypass
intended wireless network sharing restrictions via unspecified vectors
(CVE-2011-2176).

Incomplete blacklist vulnerability in the svEscape function in
settings/plugins/ifcfg-rh/shvar.c in the ifcfg-rh plug-in for GNOME
NetworkManager 0.9.1, 0.9.0, 0.8.1, and possibly other versions, when
PolicyKit is configured to allow users to create new connections,
allows local users to execute arbitrary commands via a newline
character in the name for a new network connection, which is not
properly handled when writing to the ifcfg file (CVE-2011-3364).

Instead of patching networkmanager, the latest 0.8.6.0 stable
version is being provided due to the large amount of bugs fixed
upstream. Also the networkmanager-applet, networkmanager-openconnect,
networkmanager-openvpn, networkmanager-pptp, networkmanager-vpnc is
being provided with their latest 0.8.6.0 stable versions.

The provided packages solves these security vulnerabilities.