{"id":278550,"date":"2026-06-22T10:06:00","date_gmt":"2026-06-22T14:06:00","guid":{"rendered":"https:\/\/news-you-need.com\/index.php\/2026\/06\/22\/anthropics-mythos-ai-broke-into-almost-all-nsa-classified-systems-in-hours\/"},"modified":"2026-06-22T10:40:13","modified_gmt":"2026-06-22T14:40:13","slug":"anthropics-mythos-ai-broke-into-almost-all-nsa-classified-systems-in-hours","status":"publish","type":"post","link":"https:\/\/news-you-need.com\/index.php\/2026\/06\/22\/anthropics-mythos-ai-broke-into-almost-all-nsa-classified-systems-in-hours\/","title":{"rendered":"Anthropic’s Mythos AI broke into almost all NSA classified systems in hours"},"content":{"rendered":"

Anthropic’s Mythos AI broke into almost all NSA classified systems in hours<\/a><\/p>\n

https:\/\/securityaffairs.com\/194016\/ai\/anthropics-mythos-ai-broke-into-almost-all-nsa-classified-systems-in-hours.html<\/a><\/p>\n

Publish Date: 2026-06-22 10:06:00<\/a><\/p>\n

Source Domain: securityaffairs.com<\/a><\/p>\n

Anthropic\u2019s Mythos AI broke into almost all NSA classified systems in hours<\/h2>\n<\/p>\n

\t\t\t\t\t\t\t Pierluigi Paganini<\/span>
\n\t\t\t\t\t\t\t\"\"\/ June 22, 2026<\/span><\/p>\n

\t\t\t\t\t\t\"\"\/<\/p>\n

Senate testimony claims Anthropic\u2019s Mythos AI breached NSA and Cyber Command systems in hours, prompting a U.S.-ordered shutdown.<\/h2>\n

On June 12, the Trump administration directed Anthropic to restrict access to Fable 5 and Mythos 5, its two most capable models, exclusively to US citizens. Because verifying every user\u2019s nationality in real time isn\u2019t practically possible, Anthropic\u2019s only option was to shut both models down for everyone. Allies included. No warning.<\/p>\n

The U.S. government ordered Anthropic to limit access to its Fable 5 and Mythos 5 AI models to U.S. citizens after a jailbreak was discovered. <\/p>\n

That includes Five Eyes partners, Australia, the UK, Canada, and New Zealand, and it blocked the UK AI Security Institute, the main international body for testing frontier AI models, from accessing systems it was actively evaluating.<\/p>\n

Then came the Senate testimony. According to a report by The Economist citing a Senate Intelligence Committee hearing, Anthropic\u2019s Mythos model had penetrated nearly all classified systems managed by the NSA and US Cyber Command. Senator Mark Warner stated on June 11 that General Joshua Rudd, who leads both agencies, told him directly that Mythos had done it, and not in weeks. <\/p>\n

\u201cEncryption was a potent technology, but narrow in its application. AI is far more powerful and versatile. On June 11th Mark Warner, the vice-chair of the Senate Intelligence Committee, said that General Joshua Rudd, who leads the National Security Agency and the Pentagon\u2019s Cyber Command, had told him that Mythos \u201cbroke into almost all of our classified systems, not in weeks, but in hours\u201d<\/strong>.\u201dreported The Economist.<\/p>\n

\u201cAdvanced AI differs from encryption in another respect, too. Whereas cryptography eventually became widely available abroad, America…<\/p>\n

Source<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Anthropic’s Mythos AI broke into almost all NSA classified systems in hours https:\/\/securityaffairs.com\/194016\/ai\/anthropics-mythos-ai-broke-into-almost-all-nsa-classified-systems-in-hours.html Publish Date:…<\/p>\n","protected":false},"author":1,"featured_media":278551,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/securityaffairs.com\/wp-content\/uploads\/2015\/01\/nsa-spy-on-North-Korea.jpg","fifu_image_alt":"","footnotes":""},"categories":[15],"tags":[26],"class_list":["post-278550","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity","tag-ai"],"_links":{"self":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/278550"}],"collection":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/comments?post=278550"}],"version-history":[{"count":1,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/278550\/revisions"}],"predecessor-version":[{"id":278552,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/278550\/revisions\/278552"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/media\/278551"}],"wp:attachment":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/media?parent=278550"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/categories?post=278550"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/tags?post=278550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}