Given that update9 is still in its stabilization period, we decided to roll out the fixes for the recently discovered security vulnerabilities (along with a few others) to your devices while we continue to work with update9. This hotfix update fixes

bash vulnerabilities (Shellshock) - CVE-2014-7169, CVE-2014-6271
NSS vulnerabilities - CVE-2014-1568, CVE-2014-1544, CVE-2014-1491, CVE-2014-1490, CVE-2013-5605, CVE-2013-1739, CVE-2013-1741, CVE-2013-0791
Also fixed in the browser engine (Mozilla bug #1064636)
NSPR vulnerabilities - CVE-2014-1545, CVE-2013-5607