{"id":329371,"date":"2026-09-09T00:08:46","date_gmt":"2026-09-08T22:08:46","guid":{"rendered":"https:\/\/borncity.com\/blog\/?p=329371"},"modified":"2026-09-09T00:29:36","modified_gmt":"2026-09-08T22:29:36","slug":"exchange-server-sicherheitsupdates-8-september-2026","status":"publish","type":"post","link":"https:\/\/borncity.com\/blog\/2026\/09\/09\/exchange-server-sicherheitsupdates-8-september-2026\/","title":{"rendered":"Exchange Server: Sicherheitsupdates 8. September 2026"},"content":{"rendered":"<p><img decoding=\"async\" style=\"margin: 0px 10px 0px 0px; display: inline; float: left; border-width: 0px;\" title=\"Exchange Logo\" src=\"https:\/\/borncity.com\/blog\/wp-content\/uploads\/2022\/06\/Exchange.jpg\" alt=\"Exchange Logo\" align=\"left\" border=\"0\" \/>Kurze Information f\u00fcr Administratoren von Microsoft Exchange Systemen. Microsoft hat zum 8. September 2026 Sicherheitsupdates (SU) f\u00fcr \"September 2026\" ver\u00f6ffentlicht. Diese Updates stehen f\u00fcr Exchange Server 2016 \/ 2019 (ESU) sowie f\u00fcr Exchange Server Subscription Edition (SE) zur Verf\u00fcgung. Das September 2026 SU schlie\u00dft Schwachstellen und behebt einige Probleme, hat aber gleichzeitig bekannte Probleme.<\/p>\n<p><!--more--><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/vg02.met.vgwort.de\/na\/573bdf6c0f5a479cb7cd648cf5ebe9d5\" alt=\"\" width=\"1\" height=\"1\" \/>Im Beitrag <a href=\"https:\/\/borncity.com\/blog\/2026\/09\/08\/microsoft-security-update-summary-8-september-2026\/\">Microsoft Security Update Summary<\/a> (8. September 2026) wird eine Elevation of Privilege-Schwachstelle <a href=\"https:\/\/msrc.microsoft.com\/update-guide\/en-US\/vulnerability\/CVE-2026-69380\" target=\"_blank\" rel=\"noopener\">CVE-2026-69380<\/a> (CVSSv3 Score 8.1, Important) in Microsoft Exchange Server angesprochen, die beseitigt wurde.\u00a0Details zum September 2026-Sicherheitsupdates f\u00fcr Exchange Server hat Microsoft im Techcommunity-Artikel <a href=\"https:\/\/techcommunity.microsoft.com\/blog\/Exchange\/released-september-2026-exchange-server-security-updates\/4554411\" target=\"_blank\" rel=\"noopener\">Released: September 2026 Exchange Server Security Updates<\/a> ver\u00f6ffentlicht.<\/p>\n<p><a href=\"https:\/\/techcommunity.microsoft.com\/blog\/Exchange\/released-september-2026-exchange-server-security-updates\/4554411\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-329374 size-full\" title=\"Exchange-Sept 2026-SU\" src=\"https:\/\/borncity.com\/blog\/wp-content\/uploads\/2026\/09\/Exchange-Sept-2026-SU.jpg\" alt=\"Exchange-Sept 2026-SU\" width=\"579\" height=\"491\" srcset=\"https:\/\/borncity.com\/blog\/wp-content\/uploads\/2026\/09\/Exchange-Sept-2026-SU.jpg 579w, https:\/\/borncity.com\/blog\/wp-content\/uploads\/2026\/09\/Exchange-Sept-2026-SU-300x254.jpg 300w\" sizes=\"auto, (max-width: 579px) 100vw, 579px\" \/><\/a><\/p>\n<p>Diese Security Updates (SUs September 2026) stehen f\u00fcr Exchange Server 2016, Exchange Server 2019 (nur mit ESU-Lizenz Phase 2) sowie Exchange Server Subscription Edition (SE) zur Verf\u00fcgung. Die Updates stehen hier zur Verf\u00fcgung:<\/p>\n<ul>\n<li><a class=\"lia-external-url\" href=\"https:\/\/www.microsoft.com\/en-us\/download\/details.aspx?id=108825\" target=\"_blank\" rel=\"noopener noreferrer\">Exchange SE RTM<\/a><\/li>\n<li>Exchange Server 2019\u00a0CU14 und CU15 (f\u00fcr den Zugriff muss die Organisation am <a href=\"https:\/\/techcommunity.microsoft.com\/blog\/exchange\/announcing-period-2-exchange-20162019-extended-security-update-esu-program\/4511603\" target=\"_blank\" rel=\"noopener\">ESU-Programm der Phase 2<\/a> teilnehmen)<\/li>\n<li>Exchange Server 2016\u00a0CU23 (f\u00fcr den Zugriff muss die Organisation am ESU-<a href=\"https:\/\/techcommunity.microsoft.com\/blog\/exchange\/announcing-period-2-exchange-20162019-extended-security-update-esu-program\/4511603\" target=\"_blank\" rel=\"noopener\">Programm der Phase 2<\/a> teilnehmen)<\/li>\n<\/ul>\n<p>Die Sicherheitsupdates vom September 2026 beheben an Microsoft gemeldete oder von den Entwicklern selbst im Rahmen der internen Prozesse entdeckten Schwachstellen (siehe auch <a href=\"https:\/\/borncity.com\/blog\/2026\/09\/08\/microsoft-security-update-summary-8-september-2026\/\">Microsoft Security Update Summary<\/a> (8. September 2026)).<\/p>\n<blockquote><p>Exchange Online-Kunden sind bereits vor den durch diese Sicherheitsupdates behobenen Sicherheitsl\u00fccken gesch\u00fctzt und m\u00fcssen keine weiteren Ma\u00dfnahmen ergreifen, au\u00dfer die Exchange-Server oder die Workstations mit Exchange-Verwaltungstools in ihrer Umgebung zu aktualisieren.<\/p><\/blockquote>\n<p>Microsoft weist auf ein bekanntes Problem (Known Issues) hin, das unter <a href=\"https:\/\/support.microsoft.com\/en-us\/servicing\/exchange\/server\/update\/2026\/5126672\" target=\"_blank\" rel=\"noopener noreferrer\">Published calendar (.ics) returns HTTP 500 for calendar applications<\/a> beschrieben ist. Ein Fix soll zuk\u00fcnftig kommen. Laut Techcommunity-Beitrag sollen folgende Bugs behoben sein:<\/p>\n<ul>\n<li><a href=\"https:\/\/support.microsoft.com\/en-us\/servicing\/exchange\/server\/hotfix\/2026\/5105719\" target=\"_blank\" rel=\"noopener noreferrer\">Wrapper messages appear in shared mailbox inbox in hybrid environments<\/a><\/li>\n<li><a href=\"https:\/\/support.microsoft.com\/en-us\/servicing\/exchange\/server\/update\/2026\/5125804\" target=\"_blank\" rel=\"noopener noreferrer\">Hybrid Free\/Busy over MS Graph drops the requester timezone<\/a><\/li>\n<\/ul>\n<p>Microsoft hat im Techcommunity-Beitrag einige Hinweise gegeben, die Administratoren im Umfeld zur Update-Installation beachten sollten. In einer FAQ im Techcommunity-Artikel <a href=\"https:\/\/techcommunity.microsoft.com\/blog\/Exchange\/released-september-2026-exchange-server-security-updates\/4554411\" target=\"_blank\" rel=\"noopener\">Released: September 2026 Exchange Server Security Updates<\/a> finden sich noch einige Hinweise, auf was ggf. zu beachten ist.\u00a0Frank Z\u00f6chling hat in <a href=\"https:\/\/www.frankysweb.de\/neue-sicherheitsupdates-fuer-exchange-server-september-2026\/\" target=\"_blank\" rel=\"noopener\">diesem Artikel<\/a> einige Hinweise zum Update eingestellt und es gibt erst Nutzerkommentare.<\/p>\n<p><strong>\u00c4hnliche Artikel:<br \/>\n<\/strong><a href=\"https:\/\/borncity.com\/blog\/2026\/09\/08\/microsoft-security-update-summary-8-september-2026\/\">Microsoft Security Update Summary<\/a> (8. September 2026)<br \/>\n<a href=\"https:\/\/borncity.com\/blog\/2026\/09\/09\/patchday-windows-10-11-updates-8-september-2026\/\">Patchday: Windows 10\/11 Updates<\/a> (8. September 2026)<br \/>\n<a href=\"https:\/\/borncity.com\/blog\/2026\/09\/09\/patchday-windows-server-updates-8-september-2026\/\">Patchday: Windows Server-Updates<\/a> (8. September 2026)<br \/>\n<a href=\"https:\/\/borncity.com\/blog\/2026\/09\/09\/exchange-server-sicherheitsupdates-8-september-2026\/\">Exchange Server: Sicherheitsupdates<\/a> (8. September 2026)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kurze Information f\u00fcr Administratoren von Microsoft Exchange Systemen. Microsoft hat zum 8. September 2026 Sicherheitsupdates (SU) f\u00fcr \"September 2026\" ver\u00f6ffentlicht. Diese Updates stehen f\u00fcr Exchange Server 2016 \/ 2019 (ESU) sowie f\u00fcr Exchange Server Subscription Edition (SE) zur Verf\u00fcgung. Das &hellip; <a href=\"https:\/\/borncity.com\/blog\/2026\/09\/09\/exchange-server-sicherheitsupdates-8-september-2026\/\">Weiterlesen <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[426,7459,185],"tags":[5359,15661,4328,4315],"class_list":["post-329371","post","type-post","status-publish","format-standard","hentry","category-sicherheit","category-software","category-update","tag-exchange","tag-patchday-9-2026","tag-sicherheit","tag-update"],"_links":{"self":[{"href":"https:\/\/borncity.com\/blog\/wp-json\/wp\/v2\/posts\/329371","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/borncity.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/borncity.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/borncity.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/borncity.com\/blog\/wp-json\/wp\/v2\/comments?post=329371"}],"version-history":[{"count":6,"href":"https:\/\/borncity.com\/blog\/wp-json\/wp\/v2\/posts\/329371\/revisions"}],"predecessor-version":[{"id":329378,"href":"https:\/\/borncity.com\/blog\/wp-json\/wp\/v2\/posts\/329371\/revisions\/329378"}],"wp:attachment":[{"href":"https:\/\/borncity.com\/blog\/wp-json\/wp\/v2\/media?parent=329371"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/borncity.com\/blog\/wp-json\/wp\/v2\/categories?post=329371"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/borncity.com\/blog\/wp-json\/wp\/v2\/tags?post=329371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}