Category Archives: Software

Vulnerability CVE-2026-3055 in Citrix NetScaler ADC and Gateway is being exploited

Posted on 2026-03-29 by guenni

On March 24, 2026, I warned of two critical vulnerabilities in the Citrix products mentioned in the post Critical vulnerabilities in Citrix NetScaler ADC and Gateway (March 2026). Now attacks exploiting one of these vulnerabilities are being observed in the … Continue reading →

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Microsoft Outlook Classic: Workaround for crashes caused by the Teams Meeting add-in

Posted on 2026-03-27 by guenni

[German]There is an issue with Outlook Classic where the client crashes on startup due to a faulty Microsoft Teams Meeting add-in. As far as I know, Microsoft is still investigating this problem. Below, I have compiled some workarounds for those … Continue reading →

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Critical vulnerabilities in Citrix NetScaler ADC and Gateway (March 2026)

Posted on 2026-03-25 by guenni

[German]Citrix has issued a warning about several security vulnerabilities classified as critical in its Citrix Gateway and Citrix Netscaler ADC. CERT Bund has also published a corresponding advisory. Citrix has released firmware updates to address these vulnerabilities.

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Windchill & ZeroPLM 0-day vulnerabilities

Posted on 2026-03-22 by guenni

[German]The Windchill and ZeroPLM software systems contain critical vulnerabilities (CVS Index 10.0) that companies using these products should have been aware of since the weekend. These vulnerabilities have prompted various German state criminal investigation offices to send police officers to … Continue reading →

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Ubiquiti UniFi Network Application Vulnerabilities (CVE-2026-22557, CVE-2026-22558)

Posted on 2026-03-20 by guenni

[German]Two critical vulnerabilities have recently been disclosed in the Ubiquiti UniFi Network Application. Vulnerability CVE-2026-22557 has a CVSS score of 10.0 and can be exploited without authentication to take over an account. CVE-2026-22558 has a CVSS score of 7.7 and … Continue reading →

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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 ...

Restructuring at Microsoft's Copilot division; forced Copilot app installation halted

Posted on 2026-03-18 by guenni

[German]At Microsoft, the restructuring and reorganization of its AI division continues. Mustafa Suleyman is no longer directly responsible for the Copilot division. And Microsoft has apparently put a temporary halt to its attempt to roll out Copilot across all areas … Continue reading →

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Outlook classic: Microsoft fixes accented and extended characters question mark bug

Posted on 2026-03-17 by guenni

[German]Since late January/early February 2026, users have been complaining that Outlook can no longer recognize umlauts and displays them as question marks. Microsoft appears to have recently fixed this issue in Outlook.

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Windows 11 24H2-25H2: Hotpatch KB5084597 closes vulnerabilities

Posted on 2026-03-14 by guenni

[German]Microsoft has unexpectedly released an emergency update (hotfix) for Windows 11 24H2 and 25H2 on March 13, 2026. This security update is intended to address a security issue in the RRAS management tool (Windows Routing and Remote Access Service). As … Continue reading →

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Vulnerabilities (CVE-2025-59536, CVE-2026-21852) in Anthropic Claude Code

Posted on 2026-03-02 by guenni

[German]Security researchers at Check Point Research have identified critical vulnerabilities (CVE-2025-59536, CVE-2026-21852) in Anthropic's AI-based coding tool "Claude Code." These vulnerabilities allowed remote code execution and the theft of API credentials. This is critical because attackers could abuse built-in mechanisms … Continue reading →

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MC1179154: Microsoft Authenticator locks itself when jailbreak/root access is used

Posted on 2026-03-01 by guenni

[German]A quick note for people who use the Microsoft Authenticator app on an iPhone or Android device. Microsoft has announced that, as of February 24, 2026, it will first warn and then block EntraID logins on devices with jailbreak (iOS) … Continue reading →

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