https://www.otsecurityletter.com/ 2026-05-21 https://www.otsecurityletter.com/archive 2025-11-05 https://www.otsecurityletter.com/subscribe 2025-11-05 https://www.otsecurityletter.com/authors 2026-05-21 https://www.otsecurityletter.com/authors/jake-nathan 2025-11-07 https://www.otsecurityletter.com/p/may-21-verizon-dbir-vulnerability-exploitation-overtakes-stolen-creds-as-the-1-way-in 2026-05-21 OT Security Letter en 2026-05-21T17:49:06Z May 21 - Verizon DBIR: vulnerability exploitation overtakes stolen creds as the #1 way in https://www.otsecurityletter.com/p/may-14-ransomware-reconsolidates-around-qilin-lockbit-5-0-and-the-gentlemen 2026-05-19