{"id":244940,"date":"2026-10-06T01:32:54","date_gmt":"2026-10-06T06:32:54","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/10\/microsoft-exchange-flaw-lets-authenticated-attackers-read-other-users-mailboxes"},"modified":"2026-10-06T01:32:54","modified_gmt":"2026-10-06T06:32:54","slug":"microsoft-exchange-flaw-lets-authenticated-attackers-read-other-users-mailboxes","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/10\/microsoft-exchange-flaw-lets-authenticated-attackers-read-other-users-mailboxes","title":{"rendered":"Microsoft Exchange Flaw Lets Authenticated Attackers Read Other Users\u2019 Mailboxes"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/microsoft-exchange-flaw-lets-authenticated-attackers-read-other-users-mailboxes.webp\"><\/a><\/p>\n<p>The Windows maker said an authenticated attacker can exploit this flaw to gain unauthorized access to other users\u2019 mailboxes within the same organization and read email messages and attachments. However, the vulnerability does not allow cross-tenant access.<\/p>\n<p>Microsoft has already deployed a \u201crelated service-side fix\u201d to Exchange Online to address the issue. As a result, Exchange Online customers are not required to take any action.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Windows maker said an authenticated attacker can exploit this flaw to gain unauthorized access to other users\u2019 mailboxes within the same organization and read email messages and attachments. However, the vulnerability does not allow cross-tenant access. Microsoft has already deployed a \u201crelated service-side fix\u201d to Exchange Online to address the issue. As a result, [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-244940","post","type-post","status-publish","format-standard","hentry","category-futurism"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/244940","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=244940"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/244940\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=244940"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=244940"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=244940"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}