The Cybersecurity Information Sharing Act of 2015 (CISA 2015) has been temporarily reauthorized as part of the broader legislation passed on November 12, 2025, to reopen the federal government. Under the appropriation legislation, CISA 2015 is now reauthorized until January
On December 18, 2015, President Barack Obama signed into law the Cybersecurity Information Sharing Act of 2015 (CISA) as part of the 2016 omnibus spending bill. CISA encourages businesses and the federal government to share cyber threat information in the interest of national security.
On October 27, 2015, the Cybersecurity Information Sharing Act of 2015 (CISA), passed the Senate, by a 74-21 vote. The bill’s passing by such an overwhelming majority is a crucial step towards the controversial CISA becoming law, with support from some security experts and to the chagrin of other privacy advocates.