Improper access control in Citrix ADC, Citrix Gateway
Priority LOW 31CWE-284Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.
Summary
A vulnerability has been discovered in Citrix ADC (formerly known as NetScaler ADC) and Citrix Gateway (formerly known as NetScaler Gateway), and Citrix SD-WAN WANOP Edition models 4000-WO, 4100-WO, 5000-WO, and 5100-WO. These vulnerabilities, if exploited, could lead to a phishing attack through a SAML authentication hijack to steal a valid user session.
Why it matters now
EPSS 0.00918 60th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Citrix ADC, Citrix Gateway | Citrix ADC and Citrix Gateway 13.0-82.45 and later releases of 13.0; Citrix ADC and Citrix Gateway 12.1-62.27 and later releases of 12.1 | — | No fix listed | CNA |
- Citrix ADC, Citrix Gateway Vendor— Affected Citrix ADC and Citrix Gateway 13.0-82.45 and later releases of 13.0; Citrix ADC and Citrix Gateway 12.1-62.27 and later releases of 12.1 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:citrix:application_delivery_management:12.1-62.25:*:*:*:*:*:*:* | 12.1-62.25 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:application_delivery_management:13.0-82.42:*:*:*:*:*:*:* | 13.0-82.42 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:gateway:12.1-62.25:*:*:*:*:*:*:* | 12.1-62.25 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:gateway:13.0-82.42:*:*:*:*:*:*:* | 13.0-82.42 | Vulnerable | Citrix |
- cpe:2.3:a:citrix:application_delivery_management:12.1-62.25:*:*:*:*:*:*:* Versions 12.1-62.25 Vulnerable ·Citrix
- cpe:2.3:a:citrix:application_delivery_management:13.0-82.42:*:*:*:*:*:*:* Versions 13.0-82.42 Vulnerable ·Citrix
- cpe:2.3:a:citrix:gateway:12.1-62.25:*:*:*:*:*:*:* Versions 12.1-62.25 Vulnerable ·Citrix
- cpe:2.3:a:citrix:gateway:13.0-82.42:*:*:*:*:*:*:* Versions 13.0-82.42 Vulnerable ·Citrix
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-22920
- 2026-10-03 Alias added: GHSA-5w66-9x5w-m57v
References
More Citrix Application Delivery Management vulnerabilities
- TI-2022-10524 Improper access control in Citrix Application Delivery Management CVSS 3.1HIGH 8.1
- TI-2019-06973 Citrix Application Delivery Management (ADM) 12.1.x before 12.1.50.33 has Incorrect Access Control. CVSS 3.0CRITICAL 10.0
- TI-2019-12963 Citrix Application Delivery Management (ADM) 12.1 before build 54.13 has Incorrect Access Control. CVSS 3.1HIGH 8.8
- TI-2022-10525 Use after free in Citrix Application Delivery Management CVSS 3.1MEDIUM 5.3
Sources
- CVE-2021-22920 · CVE Program
- CVE-2021-22920 · NVD
- FIRST EPSS
- GHSA-5w66-9x5w-m57v · GitHub Advisory Database · CC BY 4.0
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