Citrix Netscaler ADC: Critical vulnerabilities, update urgently

Sicherheit (Pexels, allgemeine Nutzung)[German]Various German blog readers have informed me that the provider Citrix has published several security advisories on critical vulnerabilities in the Netscaler ADC (and Gateway, and Secure Access Client for Window) as of June 17, 2025. Administrators are requested to update the affected products to the fixed versions as soon as possible.

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Windows 11/Server 2025 June 2025 updates cause BSOD in Proxmox/KVM/QEMU

Windows[German]Users of the virtualization platform Proxmox and KVM/QEMU get BlueScreens on virtualized Windows VMs as soon as they install the June 2025 updates. It affects (Proxmox) hosts with AMD CPUs (Ryzen & Epyc). And I got reports, that Linux KVM / QEMU is also affected with it's Windows VMs. The error is known and there is also a workaround.
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Veeam Backup & Replication 12.3.2 closes critical vulnerabilities (CVE-2025-23121 etc.)

Sicherheit (Pexels, allgemeine Nutzung)[German]Users of Veeam Backup & Replication must react. The provider Veeam has released Veeam Backup & Replication 12.3.2 and Veeam Agent for Microsoft Windows 6.3.2 on June 17, 2025. Among other things, Veeam Backup & Replication 12.3.2 closes a critical Remote Code Execution (RCE) vulnerability CVE-2025-23121 in (domain-joined) backup servers.

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Windows 10 22H2: Out-of-Band Update KB5063159

Windows[German]Microsoft has released a new out-of-band update KB5063159 for Windows 10 22H2 on June 16, 2025. This update contains the fixes that were generally rolled out with the security update KB5060533 from June 10, 2025. However, the out-of-band update KB5063159 for Windows 10 22H2 was necessary because there were boot problems with the Surface Hub v1.

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Archetype Market seized by Europol & Eurojust

Paragraph[German]The darknet marketplace for drugs, Archetype Market, was seized and shut down by a Europe-wide law enforcement operation. This law enforcement operation took place in six countries with the support of Europol and Eurojust. Here is a rough overview.

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

[Sponsored Post]In the rapidly evolving IT world, choosing the right remote desktop software is critical for organizations that value security, ease of use and reliability. One provider of secure remote access that has been on the market since 2001 is ISL Online, which presents some considerations for choosing such software below. More ...


Problem with Bitwarden instances (June 16, 2025)

[German]A short note for administrators in companies that use Bitwarden as a password manager in their environment. A change to the backend may cause problems with Bitwarden instances.

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Outlook crashes caused by June 2025 Updates confirmed with workaround

[German]The June 2025 security updates for Microsoft Office cause Microsoft Outlook Classic to crash in some versions. At the weekend, Microsoft confirmed these Outlook crashes and published a workaround. I'll put this information in a separate article.

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Digital sovereignty: EU cloud; Microsoft exit in Danish digital ministry; true cost of Windows 11

[German]The Danish Ministry of Digital Affairs is saying goodbye to Microsoft and will move (probably to Linux and) to LibreOffice in near future – thanks to Trump. And the LibreOffice makers have set their sights on Windows 11 in order to break down the true costs of using it. There is also currently a discussion about the EU cloud and EU data centers.

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Windows Server 2016-2025: DHCP issues after June 2025 Update

Windows[German]The June 2025 security updates have caused various problems for individual users. On Windows Server 2016, the installation takes quite a long time (long known), and some administrators have problems with DCs and Exchange. On Windows Server 2016, the June 2025 update also seems to interfere with the DHCP server. Microsoft has since confirmed that it also affects Windows Server 2019, 2022 and 2025.

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Googles Cloud "Risk Protection Program" (RPP)

[GER]I'm posting some information here on the blog that I received from Google in mid-May 2025. Google Cloud has announced that it is expanding its Risk Protection Program (RPP) to over 30 EMEA markets (including DACH). The program is about cyber insurance, where two new partners Chubb (headquartered in Zurich) and Beazley have been acquired.

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