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Critical Unpatched Citrix NetScaler RCE Zero-Days Exploited

Unauthenticated remote code execution vulnerabilities in Citrix NetScaler ADC and Gateway are being actively exploited in the wild to deploy webshells and steal credentials.

Vikas Lokhande@vlokhande9 days ago

6 intel reports

Gamaredon, a Russian FSB-operated group, uses a multi-stage modular framework (GammaPhish, GammaLoad, GammaWorm, GammaSteel) to maintain persistent access and exfiltrate sensitive documents from Ukrainian government and critical infrastructure.

The Mirage2FA Phishing-as-a-Service toolkit by LinX Coders utilizes Adversary-in-the-Middle (AiTM) techniques to bypass MFA and steal Microsoft 365 session cookies, primarily targeting US-based technology and manufacturing sectors.

The Russia-aligned Gamaredon group significantly updated its arsenal in 2025, deploying six new PowerShell tools and leveraging legitimate cloud services and tunnels to target Ukrainian military and government institutions.

The Colombian Smugglers group and other actors utilize techniques like Device Code Phishing and SVG smuggling to deliver malware including rmrlx, vjw0rm, and UnixStealer.