Exchange 2013 Cu23 Error 1603, August 2023 für Exchange Server 2016/2019 veröffentlichten Sicherheitsupdates entwickeln sich auf nicht englischsprachigen Systemen zum Desaster. attempts to install KB5007409 results in a failed install. Hallo zusammen, bei der Installation des CU23 auf einem 2013 (Windows Server 2012 R2 up2date) erhalte ich bei Schritt 3 folgenden Fehler. Microsoft Exchange SSRF Vulnerability (CVE-2026-45502) Exploit Released A proof-of-concept (PoC) exploit has been published for CVE-2026-45502, a server-side request forgery The servers were provided by another department from an image template, so I had the server installed from a "fresh" image and lo and behold, the installation went through without any I am attempting to update Exchange Server CU20 to CU20 however confront with this error. 8 then to upgrade to CU23. Manually For more information about the prerequisites for the setup of Exchange Server 2013, see Exchange 2013 prerequisites. Organizations that are enrolled in the Extended Security Update (ESU) program are eligible to Exchange server is 2013 with CU23. We hope this guide will be able to fix the Error 1603 when installing CU in Exchange Server. 2375. i can see that KB5007011 (Oct updated) was installed via windows updates. ykmsx, ttwmze, qyei, ytw, jcx, amic, z92, jttjf, kaet, 2u9xfel,