On October 21, 2025, the New York State Department of Financial Services (“NYDFS”) issued an industry letter (the “Guidance”) highlighting the cybersecurity risks related to Covered Entities’ use of Third-Party Service Providers (“TPSPs”) and providing strategies to address these risks. The Guidance is addressed to all Covered Entities subject to NYDFS’s cybersecurity regulation codified at 23 NYCRR Part 500 (“Cybersecurity Regulation”), which requires Covered Entities to implement a comprehensive cybersecurity program that includes written policies addressing TPSP risks as well as due diligence, contractual requirements, and periodic assessments for TPSPs. While the Guidance is explicit that it “does not impose any new requirements” beyond those already included in the Cybersecurity Regulation, it provides significant additional detail to clarify how to comply with existing requirements and offers industry best practices to mitigate TPSP-related cyber risks. As the Guidance suggests that NYDFS will continue to focus on TPSP-related cyber risks, Covered Entities should consider reviewing their TPSP oversight and management against the specific recommendations from the Guidance and adjusting their practices where appropriate. Alongside a review of TPSP oversight and management, Covered Entities may also consider reviewing their implementation of the provisions of the Cybersecurity Regulation requiring multifactor authentication, asset management, and data retention, which take effect on November 1, 2025.