Microsoft rolls out revamped Windows Insider Program

Collection of April 23–25, 2026 security news: a threat group (UNC6692) is using Microsoft Teams social engineering to deploy a new malware suite called “Snow” (browser extension, tunneler, backdoor); ADT confirmed a data breach after ShinyHunters extortion threats; Firestarter malware is persisting on Cisco ASA/FTD/Firepower devices despite updates; a local privilege escalation flaw dubbed Pack2TheRoot impacts PackageKit; over 10,000 Zimbra instances are being actively exploited via an XSS flaw; a critical file‑upload vulnerability in the Breeze Cache WordPress plugin is under active exploit;