Hacktivists Activity Targeting Critical Infrastructure Surged in 2025, Likely to Remain a Significant Threat in 2026

(TLP:GREEN) Over the past several years, pro-Russia hacktivist groups and others have been observed conducting cyber operations against numerous organizations and critical infrastructure sectors worldwide. These activities grew significantly in 2025, with increased targeting of industrial control systems (ICS). Due to this heightened threat, water and wastewater utilities are strongly encouraged to prioritize securing their operational technology (OT) using previously shared mitigation guidance…