Security | Threat Detection | Cyberattacks | DevSecOps | Compliance

On August 26, 2025, Citrix released fixes for a critical vulnerability in Citrix NetScaler ADC and Gateway (CVE-2025-7775) that has been exploited on unpatched appliances. The issue stems from a memory overflow flaw that could allow Remote Code Execution (RCE) and/or Denial of Service (DoS) by remote threat actors.

Trustwave, A LevelBlue Company, is a huge proponent of employing offensive security tactics to ensure a client is properly protected. For Trustwave, the reason is obvious. Offensive security is an effective approach to evaluate and enhance an overall security posture. We’ve written about this before (just check here, here, and here), but today we will explore the difference between an Authenticated Scan and an Unauthenticated Scan. Let’s set the stage by defining the two types of scans.

Unrestricted Resource Consumption (API4:2023) is the only threat category in the OWASP API Security Top 10 explicitly dedicated to Denial of Service (DoS) and resource abuse. But despite being just one category, attackers can exploit it in many different ways; from large file uploads and expensive GraphQL queries to abuse of metered third-party services like SMS gateways or AI/LLM APIs.