CISA ICS Vulnerability Advisories and Alerts, Updates, and Bulletins – December 14, 2023

Effects of El Niño on 2023 Winter Season Are Likely Increased Heat, Eastern Seaboard Snowstorm

Security & Resilience Update – Violent Extremist Threats to Critical Infrastructure, Malicious Insider Cyber Threat, and More

Supplemental General Security & Resilience Highlights – December 12, 2023

Silent but Deadly: The Rise of Zero-Click Attacks

How Malicious Insiders Use Known Vulnerabilities Against Their Organizations

Two Men Arrested in Canada for Allegedly Contributing to the Production of Terrorgram Propaganda and Connections with Atomwaffen Division Violent Extremist Group

Municipalities Face a Constant Battle as Ransomware Snowballs

Government Report on Potential Violent Extremist Threats to the Dams Sector

Government Report on the Enduring Violent Extremist Threat to the Energy Sector

Water and Wastewater Utilities and other Critical Infrastructure Fortify Defenses Against Cyber Attacks

(U//FOUO) Update to IRGC Attributed Activity Targeting Unitronics PLCs (Updated December 12, 2023)