Authentication bypass via alternate path
Published Aug 19, 2026 · Updated Aug 20, 2026
Authentication bypass in Citrix NetScaler ADC and Gateway before 14.1-73.32 and 13.1-63.21 lets remote attackers access services via crafted requests. Citrix states only that an alternate request path can bypass login checks and has not disclosed the affected handler or validation logic. Exposure requires the appliance to be configured as a Gateway or AAA virtual server; on 14.1-43.56 and later and 13.1-61.28 and later, a SAML action must also be present.
Summary
What happened
Authentication bypass in Citrix NetScaler ADC and Gateway before 14.1-73.32 and 13.1-63.21 lets remote attackers access services via crafted requests. Citrix states only that an alternate request path can bypass login checks and has not disclosed the affected handler or validation logic. Exposure requires the appliance to be configured as a Gateway or AAA virtual server; on 14.1-43.56 and later and 13.1-61.28 and later, a SAML action must also be present.
The record
- CVE
- CVE-2026-19490
- Published
- Aug 19, 2026
- Updated
- Aug 20, 2026
- Vendor
- Cloud Software Group
- Product
- NetScaler Gateway
- Classifications
- CWE-288, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 19, 2026CVE publishedPublication date reported by the CVE source.
- Aug 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=13.1 <=63.21
- Affected versionversion=14.1 <=73.32
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo