{"id":8805,"date":"2025-11-29T07:04:19","date_gmt":"2025-11-29T07:04:19","guid":{"rendered":"https:\/\/serisec.com\/index.php\/2025\/11\/29\/ms-teams-guest-access-can-remove-html\/"},"modified":"2025-11-29T07:04:19","modified_gmt":"2025-11-29T07:04:19","slug":"ms-teams-guest-access-can-remove-html","status":"publish","type":"post","link":"https:\/\/serisec.com\/index.php\/2025\/11\/29\/ms-teams-guest-access-can-remove-html\/","title":{"rendered":"MS Teams Guest Access Can Remove Defender Protection When Users Join External Tenants"},"content":{"rendered":"<p>    MS Teams Guest Access Can Remove Defender Protection When Users Join External Tenants<br \/>\n \t<BR><br \/>\n<BR><\/BR><br \/>\n    <!-- no image --><br \/>\n \t<BR><br \/>\n<BR><\/BR><\/p>\n<div>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<\/div>\n<p> \t<BR><br \/>\n <BR><\/BR><\/p>\n<p> \t<BR><br \/>\n<BR><\/BR><br \/>\n<a href=\"https:\/\/thehackernews.com\/2025\/11\/ms-teams-guest-access-can-remove.html\">Go to TheHackersNews<\/a><br \/>\n \t<BR><br \/>\n <BR><\/BR><\/p>\n","protected":false},"excerpt":{"rendered":"<p>MS Teams Guest Access Can Remove Defender Protection When Users Join External Tenants 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 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[60],"tags":[76],"class_list":["post-8805","post","type-post","status-publish","format-standard","hentry","category-thehackersnews","tag-thehackersnews"],"_links":{"self":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/8805"}],"collection":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/comments?post=8805"}],"version-history":[{"count":0,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/8805\/revisions"}],"wp:attachment":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/media?parent=8805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/categories?post=8805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/tags?post=8805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}