CISA Says Attackers Are Exploiting Two Critical Citrix NetScaler Flaws Globally

September 28, 2026 1 Min Read 0

Threat Intelligence Brief

Curated summary with source attribution

Source: thehackernews.com

Threat Risk: High
Victim: Organizations utilizing Citrix NetScaler ADC and Gateway
Incident: Active global exploitation of two critical remote code execution vulnerabilities in Citrix NetScaler appliances.
Impact: Unauthenticated attackers can execute arbitrary commands or cause denial-of-service, leading to full system compromise.
Attacker: Unidentified threat actors
Analysis: Attackers are exploiting improper input validation and memory buffer flaws to achieve remote code execution on NetScaler appliances. Because these devices typically sit at the network edge, successful exploitation provides a powerful foothold for lateral movement. The vulnerabilities are particularly severe due to their high CVSS scores and the fact that certain risky configurations are enabled by default.
Recommendations: Update NetScaler ADC and Gateway to the latest patched versions immediately.; Review NetScaler Console for available indicators of compromise (IoCs).; Isolate suspected compromised devices and rotate all local account passwords and SSL certificates.
Source: The Hacker News

Editorial note: this post summarizes third-party reporting and links to the original source.
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