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‘Five Eyes’ intelligence alliance warns that new AI models pose urgent cyber risk

By Thomson Reuters Jun 22, 2026 | 6:17 PM

By Raphael Satter

WASHINGTON, June 22 (Reuters) – Cutting-edge artificial intelligence technology is poised to supercharge offensive hacking capabilities and urgent action is ​needed to face up to the threat, ‌U.S., British, Canadian, Australian and New Zealand officials said on  Monday.

The intelligence alliance commonly known as the “Five Eyes” said in a three-page statement that, “Frontier AI models are anticipated ‌to ​exceed current industry expectations, fundamentally ⁠transforming both offensive ⁠and defensive cyber capabilities. The timeline is not years, it is months.”

The statement was light on details and mostly restated core cybersecurity advice, ​such as swiftly patching faulty software and not putting systems online unless necessary. The officials ⁠also urged defenders to use ⁠AI “to strengthen defence,” for example by ​identifying weaknesses sooner or responding more quickly to ​incidents.

The warning was another indication of officials’ increasing ‌concerns over models such as Anthropic’s “Mythos” or OpenAI’s “GPT-5.5-Cyber,” which are said to allow users to quickly execute complex — and potentially devastating — hacks.

Earlier this month, ⁠Anthropic was forced to disable a version of Mythos after the U.S. government ordered it to suspend access ⁠to the ‌models for foreign nationals over alleged ⁠national security concerns. Around the same ​time, ‌the U.S. cyber defense agency CISA — ​which was ⁠among those cosigning Monday’s statement — reduced the deadlines imposed on government officials to deal with serious digital vulnerabilities in their networks to three days, citing AI threats.

(Reporting by Raphael Satter in Washington; Editing by ​Matthew Lewis)