Cisco has swung into action to combat a hacker group's exploitation of vulnerabilities in its firmware. The group, known as the "Shadow Brokers," released online malware and other exploits it claimed to have stolen from the Equation Group, which is believed to have ties to the United States National Security Agency. Cisco earlier this month disclosed the vulnerability, "even though the patches are still under development," said Cisco spokesperson Yvonne Malmgren, "because we learned that there may be public awareness of the vulnerability."