Citrix NetScaler ADC and NetScaler Gateway Vulnerability Exploited in Denial-of-Service Attacks (CVE-2025-6543)

Citrix released a security update to address the vulnerability impacting NetScaler appliances. Tracked as CVE-2025-6543, successfully exploiting the memory overflow vulnerability may lead to unintended control flow and Denial of Service. Citrix mentioned in the advisory that they have reports suggesting exploitation of this vulnerability on unmitigated appliances. CISA acknowledged the vulnerability’s active exploitation by … Continue reading “Citrix NetScaler ADC and NetScaler Gateway Vulnerability Exploited in Denial-of-Service Attacks (CVE-2025-6543)”