OpenAI rallies 100+ companies to sign open letter warning AI-powered cyberattacks on critical infrastructure are imminent
100+ tech giants just warned: AI-powered attacks on hospitals and water plants are imminent. Here's what changes for your security posture.
Why it matters
A major coalition including OpenAI, Microsoft, Google, and Anthropic is signaling that AI-enabled cyberattacks on critical infrastructure are no longer theoretical—this frames AI security as a systemic industry and policy problem, not just a vendor concern, and likely precedes regulatory action.
The key facts
9 to know100+ companies signed open letter
Signatories include: OpenAI, Microsoft, Google, Anthropic, Deutsche Telekom, SAP
Letter warns of AI-powered attacks on hospitals and water treatment plants
Coalition framing: defenders still have the upper hand but time is limited
Focus: critical infrastructure vulnerability to AI-enabled cyber threats
100+ companies signed the open letter
Focus: AI-powered attacks on hospitals, water treatment plants, and critical infrastructure
Central claim: defenders still have tactical advantage if action is swift
Published August 27, 2026
Go to the source
The Decoderthe-decoder.com
Publisher excerpt: OpenAI, together with more than 100 companies including Microsoft, Google, Anthropic, Deutsche Telekom, and SAP, has published an open letter on AI-powered cyber defense. The coalition warns of increasingly sophisticated AI attacks on critical infrastructure such as hospitals and water treatment…