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Citrix warns of new Netscaler zero-days exploited in attacks

ID: 1e6bf4b5-423c-5fd8-b4fa-700ef92e9ed7

STIX ID: report--1e6bf4b5-423c-5fd8-b4fa-700ef92e9ed7

Feed Name: Bleeping Computer

Threat Score
85/100

Date Published: 2024-01-16

Date Updated: 2026-04-20

Author: Sergiu Gatlan

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Citrix warned of two actively exploited zero-day vulnerabilities (CVE-2023-6548: RCE requiring a low-privilege login and management-interface access; CVE-2023-6549: DoS affecting appliances configured as gateways or AAA servers) in customer-managed NetScaler ADC/Gateway versions; approximately 1,500 management interfaces are exposed online and administrators are urged to apply patches or isolate management interfaces immediately.

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