Axios: New AI models empower hackers

New AI models empower hackers
 
Illustration of a targeting scope with a sparkle shape in it over a sparkle emoji in shadows.
Illustration: Brendan Lynch/Axios
 
Top AI and government officials tell Axios CEO Jim VandeHei that Anthropic, OpenAI and other tech giants will soon release new models that are scary good at hacking sophisticated systems at scale.

The one to watch: Anthropic is privately warning top government officials that its not-yet-released model — currently branded “Mythos” — makes large-scale cyberattacks much more likely in 2026.

The model allows agents to work on their own, with wild sophistication and precision, to penetrate corporate, government and municipal systems. It’s a hacker’s dream weapon.

Jim reveals in his new weekly newsletter for CEOs that one source briefed on the coming models says a large-scale attack could hit this year. Businesses are ripe targets. (C-suite only: Request beta of Jim’s newsletter.)

Fortune got its hands on an unpublished Anthropic blog post describing Mythos. The post said the model is “currently far ahead of any other AI model in cyber capabilities.

The post adds that Mythos “presages an upcoming wave of models that can exploit vulnerabilities in ways that far outpace the efforts of defenders.

So the threat is no longer theoretical, and will be exacerbated by employees testing agents without realizing they’re making it easier for cybercriminals to hack their company.

Here’s why this is different: The new models are even better at powering agents to think, act, reason and improvise on their own without rest or pause or limitation.

Think of a warehouse full of the most sophisticated criminals who never sleep, learn on the fly and persist until successful — except the warehouse is infinite.

Bad actors can now scale simply with more compute. They aren’t limited by finite personnel. A single person can run campaigns that once required entire teams.

At the same time, systems are more vulnerable because so many employees are firing up Claude, Copilot or other agentic models — often at home — and creating agents of their own.

They often connect to their internal work systems unwittingly, opening a new door for cybercriminals to enter.

The industry has a name for this: “shadow AI.” A Dark Reading poll found that 48% of cybersecurity professionals now rank agentic AI as the No. 1 attack vector for 2026 — above deepfakes, above everything else.

The bottom line: Everyone working at every company in America needs to know right now the dangers of using agents, especially unsupervised, anywhere near sensitive information.Share this column.
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About michelleclarke2015

Life event that changes all: Horse riding accident in Zimbabwe in 1993, a fractured skull et al including bipolar anxiety, chronic fatigue …. co-morbidities (Nietzche 'He who has the reason why can deal with any how' details my health history from 1993 to date). 17th 2017 August operation for breast cancer (no indications just an appointment came from BreastCheck through the Post). Trinity College Dublin Business Economics and Social Studies (but no degree) 1997-2003; UCD 1997/1998 night classes) essays, projects, writings. Trinity Horizon Programme 1997/98 (Centre for Women Studies Trinity College Dublin/St. Patrick's Foundation (Professor McKeon) EU Horizon funded: research study of 15 women (I was one of this group and it became the cornerstone of my journey to now 2017) over 9 mth period diagnosed with depression and their reintegration into society, with special emphasis on work, arts, further education; Notes from time at Trinity Horizon Project 1997/98; Articles written for Irishhealth.com 2003/2004; St Patricks Foundation monthly lecture notes for a specific period in time; Selection of Poetry including poems written by people I know; Quotations 1998-2017; other writings mainly with theme of social justice under the heading Citizen Journalism Ireland. Letters written to friends about life in Zimbabwe; Family history including Michael Comyn KC, my grandfather, my grandmother's family, the O'Donnellan ffrench Blake-Forsters; Moral wrong: An acrimonious divorce but the real injustice was the Catholic Church granting an annulment – you can read it and make your own judgment, I have mine. Topics I have written about include annual Brain Awareness week, Mashonaland Irish Associataion in Zimbabwe, Suicide (a life sentence to those left behind); Nostalgia: Tara Hill, Co. Meath.
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