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CVE-2025-6543 — Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability

CISA KEVExploited: confirmedCitrix

Citrix NetScaler ADC and Gateway contain a buffer overflow vulnerability leading to unintended control flow and Denial of Service. NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.

Vulnerability details