CVE-2026-19490
NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-19490
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: from 14.1 through 73.32 and from 13.1 through 63.21; Gateway: from 14.1 through 73.32 and from 13.1 through 63.21.
Official description from the CVE record, published by NetScaler. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org
Key data
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
Attack vector: Network
The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity: Low
No measurable action is needed to get around the system's built-in security controls. The attack is repeatable.
Attack requirements: None
The attack works without any special deployment or execution conditions.
Privileges required: None
No account or privileges are needed.
User interaction: None
No action from any user is needed.
Vulnerable system: confidentiality: High
Serious or total effect on the secrecy of data.
Vulnerable system: integrity: High
Serious or total effect on the trustworthiness of data.
Vulnerable system: availability: High
Serious or total effect on availability.
Subsequent systems: confidentiality: Low
Limited effect on other systems' data secrecy.
Subsequent systems: integrity: Low
Limited effect on other systems' data trustworthiness.
Subsequent systems: availability: Low
Limited effect on other systems' availability.
| Metric | Value | What it means |
|---|---|---|
| Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity | Low | No measurable action is needed to get around the system's built-in security controls. The attack is repeatable. |
| Attack requirements | None | The attack works without any special deployment or execution conditions. |
| Privileges required | None | No account or privileges are needed. |
| User interaction | None | No action from any user is needed. |
| Vulnerable system: confidentiality | High | Serious or total effect on the secrecy of data. |
| Vulnerable system: integrity | High | Serious or total effect on the trustworthiness of data. |
| Vulnerable system: availability | High | Serious or total effect on availability. |
| Subsequent systems: confidentiality | Low | Limited effect on other systems' data secrecy. |
| Subsequent systems: integrity | Low | Limited effect on other systems' data trustworthiness. |
| Subsequent systems: availability | Low | Limited effect on other systems' availability. |
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- Score
- 0.33262 (33.3% probability)
- Percentile
- 98.4%
- Scores of
- Nov 10, 2026
- Model
- v2026.06.15
- Name in the catalog
- Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability
- Added to the catalog
- Sep 9, 2026
- Federal due date
- Sep 12, 2026
- Exploitation
- Recorded by CISA as active
- Automatable
- yes
- Technical impact
- total
- CWE-288Authentication Bypass Using an Alternate Path or Channel
NetScaler ADC
- affected: 14.1 up to 73.32
- affected: 13.1 up to 63.21
NetScaler Gateway
- affected: 14.1 up to 73.32
- affected: 13.1 up to 63.21
- ID reserved
- Record published
- Added to CISA KEV
- Record last updated
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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:07 UTC. Sources and licenses