← Back to Feed

Exploitation of vulnerabilities affecting Citrix NetScaler ADC and Citrix NetScaler Gateway

September 28, 2026 · NCSC UK · Severity: HIGH

The NCSC has issued an urgent advisory for UK organizations to address vulnerabilities in Citrix NetScaler ADC and Gateway, noting that two of the flaws are being actively exploited. Prompt mitigation is critical to prevent potential compromise of network infrastructure. 📌 **Analyst Note:** Given the active exploitation and the critical role Citrix NetScaler plays in secure remote access, this advisory should be treated as a high priority. Organizations should verify patch deployment and monitor for signs of compromise.

Key Takeaways

  • The NCSC is urging UK organizations to promptly mitigate vulnerabilities affecting Citrix NetScaler ADC and Gateway, two of which are being actively exploited in the wild.
  • Active exploitation of these vulnerabilities poses a significant risk to network infrastructure and could lead to unauthorized access or data breaches if left unpatched.
  • Organizations using Citrix NetScaler should prioritize applying the latest security updates and review their exposure to ensure timely remediation against these threats.
☕ Buy a Coffee