Netscaler vulnerability was exploited as zero-day for nearly two months (CVE-2025-6543) FortiGuard Labs has reported a dramatic spike in exploitation attempts targeting CitrixBleed 2, a critical buffer over‑read flaw (CVE‑2025‑5777) affecting Citrix NetScaler ADC (Application Delivery Controller) and Gateway devices. Since July 28, 2025, they have detected over 6,000 exploitation attempts, mostly in the US, Australia, Germany and the UK, “with adversaries primarily focusing on high-value sectors such as technology, banking, healthcare, and education.” Meanwhile, the Dutch National Cyber Security Centre (NCSC‑NL) has confirmed that another NetScaler ADC vulnerability (CVE‑2025‑6543) – patched and disclosed by Citrix in late June 2025 – has been exploited as a zero-day vulnerability since…