{"id":173263,"date":"2026-01-14T22:03:11","date_gmt":"2026-01-14T22:03:11","guid":{"rendered":"https:\/\/ushopwell.com\/ublog\/a-single-click-mounted-a-covert-multistage-attack-against-copilot\/"},"modified":"2026-01-14T22:03:11","modified_gmt":"2026-01-14T22:03:11","slug":"a-single-click-mounted-a-covert-multistage-attack-against-copilot","status":"publish","type":"post","link":"https:\/\/ushopwell.com\/ublog\/a-single-click-mounted-a-covert-multistage-attack-against-copilot\/","title":{"rendered":"A single click mounted a covert, multistage attack against Copilot"},"content":{"rendered":"
\n

Microsoft has fixed a vulnerability in its Copilot AI assistant that allowed hackers to pluck a host of sensitive user data with a single click on a URL.<\/p>\n

The hackers in this case were white-hat researchers from security firm Varonis<\/a>. The net effect of their multistage attack was that they exfiltrated data, including the target\u2019s name, location, and details of specific events from\u00a0the user\u2019s Copilot chat history. The attack continued to run even when the user closed the Copilot chat, with no further interaction needed once the user clicked the link in the email. The attack and resulting data theft bypassed enterprise endpoint security controls and detection by endpoint protection apps.<\/p>\n

It just works<\/h2>\n

\u201cOnce we deliver this link with this malicious prompt, the user just has to click on the link and the malicious task is immediately executed,\u201d Varonis security researcher Dolev Taler told Ars. \u201cEven if the user just clicks on the link and immediately closes the tab of Copilot chat, the exploit still works.\u201d<\/p>\n

Read full article<\/a><\/p>\n

Comments<\/a><\/p>\n<\/div>\n

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Microsoft has fixed a vulnerability in its Copilot AI assistant that allowed hackers to pluck a host of sensitive user data with a single click on a URL. The hackers in this case were white-hat researchers from security firm Varonis. The net effect of their multistage attack was that they exfiltrated data, including the target\u2019s name, location, and details of specific events from\u00a0the user\u2019s Copilot chat history. The attack continued…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[241],"tags":[],"class_list":["post-173263","post","type-post","status-publish","format-standard","hentry","category-technology"],"yoast_head":"\nA single click mounted a covert, multistage attack against Copilot - UshopWell.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ushopwell.com\/ublog\/a-single-click-mounted-a-covert-multistage-attack-against-copilot\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A single click mounted a covert, multistage attack against Copilot - UshopWell.com\" \/>\n<meta property=\"og:description\" content=\"Microsoft has fixed a vulnerability in its Copilot AI assistant that allowed hackers to pluck a host of sensitive user data with a single click on a URL. 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