{"id":219872,"date":"2026-05-25T08:17:00","date_gmt":"2026-05-25T12:17:00","guid":{"rendered":"https:\/\/testing.news-you-need.com\/index.php\/2026\/05\/25\/oncology-institute-discloses-data-breach\/"},"modified":"2026-05-25T14:45:13","modified_gmt":"2026-05-25T18:45:13","slug":"oncology-institute-discloses-data-breach","status":"publish","type":"post","link":"https:\/\/testing.news-you-need.com\/index.php\/2026\/05\/25\/oncology-institute-discloses-data-breach\/","title":{"rendered":"Oncology Institute Discloses Data Breach"},"content":{"rendered":"<p><a href=\"https:\/\/www.securityweek.com\/oncology-institute-discloses-third-party-data-breach\/\">Oncology Institute Discloses Data Breach<\/a><\/p>\n<p><a href=\"https:\/\/www.securityweek.com\/oncology-institute-discloses-third-party-data-breach\/\">https:\/\/www.securityweek.com\/oncology-institute-discloses-third-party-data-breach\/<\/a><\/p>\n<p>Publish Date: <a href=\"publish_date]\">2026-05-25 08:17:00<\/a><\/p>\n<p>Source Domain: <a href=\"www.securityweek.com\">www.securityweek.com<\/a><\/p>\n<p>Author: <a href=\"\"><\/a><\/p>\n<p> Using an unordered list, summarize the following article with between 4 and 8 key points. <\/p>\n<p>The Oncology Institute says a previously disclosed cybersecurity incident has been confirmed to impact patient information.<\/p>\n<p>The Oncology Institute (TOI) is an oncology provider founded in 2007 that delivers specialized cancer care through a network of over 100 clinics across five states.<\/p>\n<p>The healthcare organization told the SEC in November 2025 that it had learned of a cybersecurity incident affecting a third-party software services provider. At the time, the vendor\u2019s investigation was ongoing and it could not say whether patient information had been compromised.\u00a0<\/p>\n<p>\u201cHowever, on May 20, 2026, Kroll, who is the third-party administrator for the Vendor, notified [TOI] that the Vendor had detected unauthorized access by a third party to certain information systems of [TOI], including systems affecting data of patients,\u201d TOI said in a new SEC filing last week.\u00a0<\/p>\n<p>It added, \u201c[TOI] believes that the cybersecurity incident has affected various other healthcare service providers, and the Vendor has set up a patient portal through which it intends to provide information and responses to inquiries.\u201d<\/p>\n<p>While TOI has not named the third-party software vendor, the timeline and the reported impact of the breach across multiple healthcare organizations point to Cognizant-owned healthcare technology company TriZetto Provider Solutions as a possible candidate.Advertisement. Scroll to continue reading.<\/p>\n<p>Kroll is handling disclosures for TriZetto, which earlier this year reported suffering a data breach affecting multiple customers and roughly 3.4 million individuals.<\/p>\n<p>It\u2019s unclear who is behind the attack. No known ransomware group has claimed responsibility for an attack on TriZetto or the Oncology Institute.\u00a0<\/p>\n<p>SecurityWeek has reached out to TOI for additional information and will update this article if it responds.\u00a0<\/p>\n<p>Related: 266,000 Affected by Data Breach at Radiology Associates of Richmond<\/p>\n<p>Related: 716,000 Impacted by OpenLoop Health Data Breach<\/p>\n<p>Related: Millions Impacted Across Several US Healthcare Data Breaches<\/p>\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Oncology Institute Discloses Data Breach https:\/\/www.securityweek.com\/oncology-institute-discloses-third-party-data-breach\/ Publish Date: 2026-05-25 08:17:00 Source Domain: www.securityweek.com Author: Using&#8230;<\/p>\n","protected":false},"author":1,"featured_media":219873,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/www.securityweek.com\/wp-content\/uploads\/2026\/03\/healthcare-medical.jpeg","fifu_image_alt":"","footnotes":""},"categories":[15],"tags":[30,24],"class_list":["post-219872","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity","tag-breach","tag-cybersecurity"],"_links":{"self":[{"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/219872"}],"collection":[{"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/comments?post=219872"}],"version-history":[{"count":1,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/219872\/revisions"}],"predecessor-version":[{"id":219874,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/219872\/revisions\/219874"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/media\/219873"}],"wp:attachment":[{"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/media?parent=219872"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/categories?post=219872"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/tags?post=219872"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}