Cisco releases 12 sets of security patches

Eleven of the advisories published on Wednesday cover vulnerabilities in Cisco Internetwork Operating System (IOS), the software used on all Cisco switches and most Cisco routers.

The Cisco IOS vulnerabilities addressed include protocol flaws which cause system crashes and hangs, or leave systems open to denial-of-service attacks.

The remaining advisory addresses flaws in Cisco Unified Communications Manager that could leave systems open to denial-of-service attacks.

Details of the advisories and links to patches can be found on Cisco's security-advisories web page.