Tag Archives: Windows Server 2025

Windows 11 24H2 and Windows Server 2025 has Kerb3961

Posted on 2025-06-23 by guenni

[German]Brief note for administrators of clients with Windows 11 24H2.clients and Windows Server 2025 hosts. Microsoft has integrated the Kerb3961 library into these operating systems. This is a refactoring of the Kerberos cryptography engine in a separate library and shall … Continue reading →

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BadSuccessor: Read up on the dMSA AD privilege increase issue

Posted on 2025-05-29 by guenni

[German]Recently, security researchers have pointed out a potential vulnerability lurking in the delegated Managed Service Accounts (dMSAs) newly introduced in Windows Server 2025. By abusing dMSAs, attackers can take over any principal in the domain. A security researcher is critical … Continue reading →

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BadSuccessor: Abusing dMSA to elevate privileges in Active Directory

Posted on 2025-05-23 by guenni

[German]Delegated Managed Service Accounts (dMSAs) have been introduced in Windows Server 2025. These are service accounts for the Active Directory (AD) that are intended to enable new functions. Security researchers have now discovered that by misusing dMSAs, attackers can take … Continue reading →

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Windows 11 24H2/Server 2025: Why is the May 2025 update KB5058411 over 4.3 GB in size?

Posted on 2025-05-21 by guenni

[German]On May 13, 2025, Microsoft released the cumulative security update KB5058411 for Windows 11 24H2 and Windows Server 2025 (24H2). This has the incredible size of 4368.9 MByte. This raises the question of what makes the update package so bloated? … Continue reading →

Posted in Update, Windows | Tagged , , | 2 Comments

Microsoft's unloved ReFS files system – CPU/RAM utilization bug in Windows Server 2025 unfixed

Posted on 2025-05-17 by guenni

[German]The ReFS file system introduced by Microsoft in Windows a long time ago seems to be a "stepchild" of the developers. Bugs are never fixed – even with Windows Server 2025, the May 2025 patchday has not changed the problem … Continue reading →

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Why ISL Online: Critical factors when choosing a remote desktop solution

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Windows Server 2025: Hotpatching need a subscription from July 1, 2025

Posted on 2025-04-29 by guenni

[German]Microsoft offers a so-called hot patching option to Windows Server 2025,  so that restarts can be suspended during the monthly security updates. Redmond has now announced that this feature need a subscription ans will be charged from July 1, 2025 onwards. … Continue reading →

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Windows 11 24H2/Server 2025: Microsoft fixes remote desktop freezes caused by Feb. 2025 update

Posted on 2025-04-24 by guenni

[German]Users of Windows 11 24H2 and Windows Server 2025 have been plagued by problems with remote desktop connections for months. Microsoft has now announced that it has at least fixed the freezing of remote desktop connections as a result of … Continue reading →

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Windows Server 2025: Microsoft has fixed BlueSceen and issues

Posted on 2025-04-24 by guenni

[German]A bug in Windows Server 2025 known since October 2024, which led to Blue Screens, hanging systems or extremely slow restarts in certain constellations, was confirmed by Microsoft, and has been fixed in November 2024. But Microsoft has documented this … Continue reading →

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Windows Server 2025: Domain Controller no longer accessible after restart

Posted on 2025-04-18 by guenni

[German]Small addendum to a topic that has been left here for a few days. Microsoft has already confirmed a new problem with Windows Server 2025 in connection with Active Directory Domain Controllers (DC) on April 11, 2025. After restarting the … Continue reading →

Posted in issue, Windows | Tagged , | 4 Comments

Windows 11 24H2/Server 2025: Dynamic Update KB5055671

Posted on 2025-04-15 by guenni

Microsoft has released the Dynamic Update KB5055671 (Safe OS Dynamic Update) for Windows 11 24H2 and Windows Server 2025 on April 8, 2025. This update is available via Windows Update and improves the Windows Recovery Environment (Win RE) in Windows … Continue reading →

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