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Active Exploitation of Citrix NetScaler CVE-2025-6543 in Critical Dutch Sectors

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πŸ“° 1 unique sources, 1 articles

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The Dutch National Cyber Security Centre (NCSC-NL) has confirmed active exploitation of the critical Citrix NetScaler CVE-2025-6543 vulnerability in several critical organizations within the Netherlands. The flaw, which allows for unintended control flow and denial-of-service (DoS), has been exploited as a zero-day since early May 2025. The exploitation was discovered on July 16, 2025, and malicious web shells were found on affected Citrix devices. The vulnerability impacts Citrix NetScaler ADC products configured as a Gateway or AAA virtual server. Patches were released in late June 2025, and the flaw has been added to the U.S. CISA's Known Exploited Vulnerabilities (KEV) catalog. Organizations are advised to apply the latest updates and terminate active sessions to mitigate the risk.

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  1. 12.08.2025 11:36 πŸ“° 1 articles

    Active Exploitation of Citrix NetScaler CVE-2025-6543 in Critical Dutch Sectors Confirmed

    The Dutch National Cyber Security Centre (NCSC-NL) has confirmed active exploitation of the critical Citrix NetScaler CVE-2025-6543 vulnerability in several critical organizations within the Netherlands. The flaw, which allows for unintended control flow and denial-of-service (DoS), has been exploited as a zero-day since early May 2025. The exploitation was discovered on July 16, 2025, and malicious web shells were found on affected Citrix devices.

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