China and Iran Are Already Inside US Grids: CISA Demands Tested Isolation Plans

July 29, 2026 1 Min Read 0

Threat Intelligence Brief

Curated summary with source attribution

Source: techtimes.com

Threat Risk: High
Victim: US Critical Infrastructure and Telecommunications Providers
Incident: Persistent infiltration of US power grids and telecom carriers by Chinese state-sponsored hacking groups.
Impact: Potential for catastrophic failure of vital utility services and unauthorized access to government law enforcement wiretap systems.
Attacker: Volt Typhoon and Salt Typhoon
Analysis: Chinese threat actors Volt Typhoon and Salt Typhoon have established long-term persistence within US critical infrastructure and major telecommunications providers. A systemic vulnerability exists where Operational Technology (OT) relies on corporate IT services like Active Directory and DNS, causing systems to fail when isolated during an active attack. This architectural dependency transforms a defensive isolation maneuver into a self-inflicted denial-of-service.
Recommendations: Deploy standalone Active Directory and DNS instances specifically within the OT network perimeter.; Implement hardware-enforced data diodes to maintain monitoring without creating return attack paths.; Establish rigorous sanitization protocols for all removable media used to patch air-gapped environments.
Source: TechTimes

Editorial note: this post summarizes third-party reporting and links to the original source.
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