{"id":2641,"date":"2025-11-28T08:33:00","date_gmt":"2025-11-28T08:33:00","guid":{"rendered":"https:\/\/infosec-daily.com\/?page_id=2641"},"modified":"2025-11-28T08:33:00","modified_gmt":"2025-11-28T08:33:00","slug":"ms-teams-guest-access-can-remove-defender-protection-when-users-join-external-tenants","status":"publish","type":"page","link":"https:\/\/infosec-daily.com\/?page_id=2641","title":{"rendered":"MS Teams Guest Access Can Remove Defender Protection When Users Join External Tenants"},"content":{"rendered":"<p>Cybersecurity researchers have shed light on a cross-tenant blind spot that allows attackers to bypass Microsoft Defender for Office 365 protections via the guest access feature in Teams.<br \/>\n&#8220;When users operate as guests in another tenant, their protections are determined entirely by that hosting environment, not by their home organization,&#8221; Ontinue security researcher Rhys Downing said in a report<\/p>","protected":false},"excerpt":{"rendered":"<p>Cybersecurity researchers have shed light on a cross-tenant blind spot that allows attackers to bypass Microsoft Defender for Office 365 protections via the guest access feature in Teams. &#8220;When users&hellip;<\/p>\n","protected":false},"author":1,"featured_media":2642,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"saved_in_kubio":false,"footnotes":""},"class_list":["post-2641","page","type-page","status-publish","has-post-thumbnail","hentry"],"kubio_ai_page_context":{"short_desc":"","purpose":"general"},"_links":{"self":[{"href":"https:\/\/infosec-daily.com\/index.php?rest_route=\/wp\/v2\/pages\/2641","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/infosec-daily.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/infosec-daily.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/infosec-daily.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/infosec-daily.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2641"}],"version-history":[{"count":0,"href":"https:\/\/infosec-daily.com\/index.php?rest_route=\/wp\/v2\/pages\/2641\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/infosec-daily.com\/index.php?rest_route=\/wp\/v2\/media\/2642"}],"wp:attachment":[{"href":"https:\/\/infosec-daily.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2641"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}