--- title: Novocure data breach affects more than 1,400 cancer patients description: Healthtech company Novocure disclosed in an SEC filing that a mid-August cyberattack exposed data on more than 1,400 U.S. cancer patients and an undisclosed... canonical: https://daily.dev/posts/novocure-data-breach-affects-more-than-1-400-cancer-patients-hysz2mw7f twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Novocure data breach affects more than 1,400 cancer patients | daily.dev og:description: Healthtech company Novocure disclosed in an SEC filing that a mid-August cyberattack exposed data on more than 1,400 U.S. cancer patients and an undisclosed... og:url: https://daily.dev/posts/novocure-data-breach-affects-more-than-1-400-cancer-patients-hysz2mw7f og:image: https://api.daily.dev/og/posts/HysZ2mw7f.png og:image:alt: Novocure data breach affects more than 1,400 cancer patients og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Novocure data breach affects more than 1,400 cancer patients **[BleepingComputer](https://daily.dev/sources/bleepingcomputer)** · 3 min read · 0 upvotes · 0 comments ## Summary Healthtech company Novocure disclosed in an SEC filing that a mid-August cyberattack exposed data on more than 1,400 U.S. cancer patients and an undisclosed number of employees. Most patient records contained only ID numbers without names, but fewer than 50 patients in the western U.S. had identifying and healthcare provider contact information exposed. Employee contact details, job titles, and phone numbers were also compromised. Medical treatment devices were unaffected and operations remain functional. The ShinyHunters extortion gang claimed responsibility and leaked a 33GB archive allegedly stolen from Novocure's systems, adding to a string of recent healthcare breaches including Unlimited Technology Systems, CareCloud, Nutex, and McKesson. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How many cancer patients were affected by the Novocure data breach? More than 1,400 U.S. cancer patients had records accessed, though those records contained only ID numbers without names or other identifying data. Fewer than 50 additional patients in the western U.S. had identifying information and healthcare provider contact details exposed. Novocure also confirmed employee contact information, job titles, and phone numbers were compromised, but no medical treatment devices were accessed. _Healthcare security teams tracking breach disclosures like this follow ongoing incident coverage on daily.dev._ ### Who claimed responsibility for the Novocure data breach? The ShinyHunters extortion gang claimed responsibility for the mid-August attack on Novocure and leaked a 33GB archive of allegedly stolen files. ShinyHunters has previously been linked to breaches at Snowflake customers, Salesloft Drift and Salesforce Aura campaigns, and over 100 organizations hit through an Oracle PeopleSoft zero-day flaw. _Security teams monitoring extortion group activity like ShinyHunters' campaigns stay informed via daily.dev._ ## Similar posts on daily.dev - [Pharma giant Novo Nordisk discloses breach of clinical trials data](https://daily.dev/posts/pharma-giant-novo-nordisk-discloses-breach-of-clinical-trials-data-rsifeek9k) · BleepingComputer · 0 upvotes · 0 comments - [Hospital operator Nutex Health says data stolen in cyberattack](https://daily.dev/posts/hospital-operator-nutex-health-says-data-stolen-in-cyberattack-0jqj6z1bn) · BleepingComputer · 0 upvotes · 0 comments --- Tags: [#healthcare](https://daily.dev/tags/healthcare), [#data-breach](https://daily.dev/tags/data-breach) [View this post on daily.dev](https://daily.dev/posts/novocure-data-breach-affects-more-than-1-400-cancer-patients-hysz2mw7f) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Novocure data breach affects more than 1,400 cancer patients","url":"https://daily.dev/posts/novocure-data-breach-affects-more-than-1-400-cancer-patients-hysz2mw7f","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/novocure-data-breach-affects-more-than-1-400-cancer-patients-hysz2mw7f"},"datePublished":"2026-09-03T05:31:39.509Z","dateModified":"2026-09-03T11:21:37.247Z","description":"Healthtech company Novocure disclosed in an SEC filing that a mid-August cyberattack exposed data on more than 1,400 U.S. cancer patients and an undisclosed...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/ffd120db4c146f9634509f093bab5429?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/ffd120db4c146f9634509f093bab5429?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"BleepingComputer","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"BleepingComputer","logo":"https://media.daily.dev/image/upload/s--as8nJ3qy--/f_auto,q_auto/v1774959951/logos/bleepingcomputer?_a=BAMAMiWQ0","url":"https://daily.dev/sources/bleepingcomputer"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/novocure-data-breach-affects-more-than-1-400-cancer-patients-hysz2mw7f","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"healthcare,data-breach","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"BleepingComputer","item":"https://daily.dev/sources/bleepingcomputer"},{"@type":"ListItem","position":3,"name":"Novocure data breach affects more than 1,400 cancer patients"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/novocure-data-breach-affects-more-than-1-400-cancer-patients-hysz2mw7f#faq","mainEntity":[{"@type":"Question","name":"How many cancer patients were affected by the Novocure data breach?","acceptedAnswer":{"@type":"Answer","text":"More than 1,400 U.S. cancer patients had records accessed, though those records contained only ID numbers without names or other identifying data. Fewer than 50 additional patients in the western U.S. had identifying information and healthcare provider contact details exposed. Novocure also confirmed employee contact information, job titles, and phone numbers were compromised, but no medical treatment devices were accessed. Healthcare security teams tracking breach disclosures like this follow ongoing incident coverage on daily.dev."}},{"@type":"Question","name":"Who claimed responsibility for the Novocure data breach?","acceptedAnswer":{"@type":"Answer","text":"The ShinyHunters extortion gang claimed responsibility for the mid-August attack on Novocure and leaked a 33GB archive of allegedly stolen files. ShinyHunters has previously been linked to breaches at Snowflake customers, Salesloft Drift and Salesforce Aura campaigns, and over 100 organizations hit through an Oracle PeopleSoft zero-day flaw. Security teams monitoring extortion group activity like ShinyHunters' campaigns stay informed via daily.dev."}}]} ```