And also fix up these other holes that can be exploited via HTTP requests, SQL injection, etc Share Copy Cisco this week emitted patches for four sets of critical-severity security holes in its products along with other fixes. The worst of the bugs can be exploited by sending specially crafted IP packets to a vulnerable installation, and overflowing a memory buffer to ultimately execute code as root on the machine, allowing the box to be completely commandeered. Another set of flaws can be abused by sending HTTP requests that trigger arbitrary command execution to again hijack the machine. You should install updates to address these vulnerabilities as soon as possible.