Definition
NetScaler is citrix’s application delivery controller (ADC) and Gateway platform widely deployed for VPN, remote access, and AAA—making it a high-value perimeter target for initial access brokers.
Key Points
- CVE-2025-5777 (CitrixBleed 2): active IAB exploitation H1 2026 with repeatable ransomware chains
- CVE-2026-3055: SAML IdP memory overread (June 2026)
- Pattern repeats 2023 CitrixBleed (CVE-2023-4966) rapid weaponization cycle
- Shadowserver: 42% of 56K internet-facing instances on vulnerable builds (July 2025 scan data)