Patched Citrix NetScaler Devices Still Contain Backdoors

Online Scans Show More Than 1,200 Patched NetScaler Devices Are Backdoored
Hackers moved faster than system administrators to exploit a zero-day vulnerability in Citrix NetScaler appliances by dropping web shells that remain active even after a patch, warn Dutch security researchers. Dutch firm Fox-IT says researchers "could not discern a pattern in the targeting."

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