Security Affairs newsletter Round 555 by Pierluigi Paganini – INTERNATIONAL EDITION

Security Affairs newsletter Round 555 by Pierluigi Paganini – INTERNATIONAL EDITION is published on 21 December 2025 and presents a new weekly round of the site’s best security articles delivered to subscribers by email. The edition highlights several stories, including “ATM Jackpotting ring busted: 54 indicted by DoJ” and “U.S.

CISA adds a flaw in WatchGuard Fireware OS to its Known Exploited Vulnerabilities catalog.” It also covers Denmark’s claim that Russia was behind a destructive cyber attack on a water utility in 2024, and warnings about large-scale extortion campaigns such as CLOP targeting Gladinet CentreStack servers.

Additional items note vulnerabilities in motherboard families—ASRock, ASUS, GIGABYTE, MSI—pre-boot memory attacks, and the China-linked APT UAT-9686 targeting Cisco Secure Email Gateway and Secure Email and Web Manager. The INTERNATIONAL EDITION compiles entries across Cyber Crime, Hacking, and other categories, offering a snapshot of recent security incidents and advisories.