Critical

Citrix urges customers to fix critical NetScaler authentication bypass (CVE-2026-19490)

Help Net Security

August 21, 2026 at 7:55 AM

Overview

Citrix has identified and patched two vulnerabilities in its NetScaler ADC and NetScaler Gateway products, one of which is a serious authentication bypass flaw designated as CVE-2026-19490. This vulnerability could allow unauthorized access to systems, putting customer data at risk. Citrix is urging all users of the affected appliances to check if their deployments are impacted and to promptly upgrade to the recommended builds. Anil Shetty, a senior VP at Cloud Software Group, emphasized the importance of this upgrade to maintain security. Users need to act quickly to prevent potential exploitation of this flaw.

Key Takeaways

Affected Systems: NetScaler ADC, NetScaler Gateway, Citrix products
Action Required: Customers should upgrade their affected appliances to the recommended builds as outlined in the official NetScaler ADC and NetScaler Gateway security bulletin.
Timeline: Newly disclosed

Original Article Summary

Citrix has patched two vulnerabilities in NetScaler ADC and NetScaler Gateway, including a critical authentication bypass flaw tracked as CVE-2026-19490, and is urging customers to upgrade affected appliances as soon as possible. “We strongly recommend that customers review the official NetScaler ADC and NetScaler Gateway security bulletin, assess whether their deployments are affected, and upgrade impacted appliances to the recommended builds as soon as possible,” Anil Shetty, senior VP of Engineering with Cloud Software Group … More → The post Citrix urges customers to fix critical NetScaler authentication bypass (CVE-2026-19490) appeared first on Help Net Security.

Impact

NetScaler ADC, NetScaler Gateway, Citrix products

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Newly disclosed

Remediation

Customers should upgrade their affected appliances to the recommended builds as outlined in the official NetScaler ADC and NetScaler Gateway security bulletin.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to CVE, Vulnerability, Critical.

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