Citrix Patches Yet Another Under-Fire Zero-Day in NetScaler

Incident & Breach Response
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Security Operations

Denial of Service May Be Targeted to Help Exploit Other Recently Patched Flaws

Mathew J. Schwartz (euroinfosec) •
October 5, 2026    

Citrix NetScaler appliances are under fire again, with attackers targeting a zero-day vulnerability to crash the devices.

See Also: Improving Cyber Resilience for Water and Wastewater Utilities

A Sunday security alert from Citrix says it issued patches to fix the…