Effective October 18, 2011, Cisco has replaced the existing RSS feeds for Cisco Security Advisories. The new RSS feeds for Cisco Security Advisories are available at http://tools.cisco.com/security/center/psirtrss10/CiscoSecurityAdvisory.xml and http://tools.cisco.com/security/center/psirtrss20/CiscoSecurityAdvisory.xml. The existing RSS feeds will continue to function until November 19, 2011. They will not receive updates after this date.