CISA Warns of Microsoft Defender 0-Day Vulnerabilities Exploited in Attacks

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two critical Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, warning organizations of active exploitation risks. The flaws, tracked as CVE-2026-45498 and CVE-2026-41091, impact Microsoft Defender and could allow attackers to disrupt systems or escalate privileges. Both vulnerabilities were officially added to the […]

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