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Exploit for Improper Restriction of Operations within the Bounds of a Memory Buffer in Citrix Netscaler_Application_Delivery_Controller

Sploitus • September 27, 2026

A critical Remote Code Execution (RCE) vulnerability, tracked as CVE-2026-8452, has been identified in Citrix Netscaler appliances. This flaw allows unauthenticated attackers to execute arbitrary code on vulnerable systems, posing a severe risk to enterprise perimeters.\n\nOur latest security advisory details the technical mechanics of the exploit, affected firmware versions, and immediate mitigation steps network administrators must take to secure their infrastructure.\n\nRead the full vulnerability analysis and patching guide on our official security portal.

**[Read the full technical breakdown here](

*Maintained by Kiran Sonawane | Senior Cloud & DevOps Engineer*

The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical Zero-Day Vulnerabilities in Citrix NetScaler Under Active Exploitation On September 26, 2026, security firm watchTowr reported two unpatched zero-day vulnerabilities in Citrix NetScaler ADC and Gateway appliances, allowing remote code execution (RCE) and actively exploited in the wild. Citrix has confirmed the existence of these vulnerabilities, tracked as CVE-2026-88771 and CVE-2026-88772, with severity scores of 9.5. The vulnerabilities were discovered during forensic investigations, indicating they were exploited before any patch was available. Administrators were advised to shut down their NetScaler appliances as a precaution. Citrix has since released a security bulletin detailing these flaws and provided patches on September 27, 2026. The vulnerabilities affect all NetScaler ADC and Gateway deployments, including those with default configurations. Organizations using these systems are urged to apply the updates immediately to mitigate the risk of exploitation. 60 sources 81

Extracted Entities

CVEs (1)

CVE-2026-8452