Archiv für April 2026

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Vom Perimeter zur Datenzentrik

Ein neuer BSI-Leitfaden definiert konkrete Anforderungen für Cloud-Lösungen im Geheimschutzkontext. Damit steht der Bundesverwaltung ein technologischer Richtungswechsel ins Haus.

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BlueHammer, RedSun, and UnDefend: Three Windows Defender Zero-Days Exploited in the Wild

BlueHammer, RedSun, and UnDefend: Three Windows Defender Zero-Days Exploited in the Wild Three Windows Defender vulnerabilities disclosed as zero-days in April 2026 are now being actively exploited: BlueHammer, RedSun, and UnDefend. All three vulnerabilities were published without patches as Proof-of-Concept (PoC) exploits by an anonymous security researcher protesting their treatment by Microsoft’s Security Response Center. […]

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