A remote code execution vulnerability exists due to improper input validation, which can allow an unauthenticated attacker to execute arbitrary commands
Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
A flaw in Citrix NetScaler allows attackers to run commands without logging in by sending specially crafted input. This is critical because these devices protect network access, so compromising them puts everything behind them at risk.
CWE-20 improper input validation in Citrix NetScaler ADC/Gateway enables unauthenticated remote code execution via malformed requests. Attack vector is network-based, requires no authentication or user interaction, and grants full command execution capability on affected appliances.