Warning: Two Unpatched Citrix NetScaler RCE Zero-Days Under Active Exploitation

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Summary by Cyber Security News27 Sep 2026, 09:47 CEST

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Two new unpatched zero-day vulnerabilities in Citrix NetScaler ADC and NetScaler Gateway appliances that allow remote code execution are being actively exploited in the wild, security firm watchTowr said on September 26. Citrix has not confirmed the flaws or published a fix. Some administrators say they have taken appliances offline rather than wait for one to be available.

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