The clock is ticking toward September 30, 2025, when one of America’s most vital cybersecurity protections will expire unless Congress acts. The Cybersecurity Information Sharing Act of 2015 (CISA 2015) has quietly become the backbone of our nation’s cyber defense. Without creating any additional regulations, it enabled the rapid sharing of threat intelligence between government and businesses that has prevented countless cyber attacks over the past decade. The Act’s protections have facilitated threat warnings to thousands of organizations just this year. Its potential sunset threatens to unleash a wave of cyberattacks that will devastate the small and medium-sized businesses (SMBs) that form a foundational part of our economy.

As someone who has worked on both sides—first leading p

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