{"id":18378,"date":"2025-11-28T08:33:00","date_gmt":"2025-11-28T08:33:00","guid":{"rendered":"https:\/\/sekuritasit.com\/index.php\/2025\/11\/28\/ms-teams-guest-access-can-remove-defender-protection-when-users-join-external-tenants-infothehackernews-com-the-hacker-news\/"},"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-infothehackernews-com-the-hacker-news","status":"publish","type":"post","link":"https:\/\/sekuritasit.com\/index.php\/2025\/11\/28\/ms-teams-guest-access-can-remove-defender-protection-when-users-join-external-tenants-infothehackernews-com-the-hacker-news\/","title":{"rendered":"MS Teams Guest Access Can Remove Defender Protection When Users Join External Tenants info@thehackernews.com (The Hacker News)"},"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<a href=\"https:\/\/thehackernews.com\/2025\/11\/ms-teams-guest-access-can-remove.html\" target=\"_blank\" class=\"feedzy-rss-link-icon\">Read More<\/a>\u00a0<\/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 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 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