Improper input validation in Citrix ADC, Citrix Gateway
Priority LOW 37CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
Improper input validation in Citrix ADC and Citrix Gateway versions before 11.1-63.9 and 12.0-62.10 allows unauthenticated users to perform a denial of service attack.
Why it matters now
EPSS 0.01949 80th 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 | 11.1-63.9, 12.0-62.10 | — | No fix listed | CNA |
- Citrix ADC, Citrix Gateway Vendor— Affected 11.1-63.9, 12.0-62.10 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:* | 11.1 to before 11.1-63.9; 12.0 to before 12.0-62.10 | Vulnerable | Citrix |
| cpe:2.3:h:citrix:application_delivery_controller:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Citrix |
| cpe:2.3:o:citrix:netscaler_gateway_firmware:*:*:*:*:*:*:*:* | 11.1 to before 11.1-63.9; 12.0 to before 12.0-62.10 | Vulnerable | Citrix |
| cpe:2.3:h:citrix:netscaler_gateway:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Citrix |
- cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:* Versions 11.1 to before 11.1-63.9; 12.0 to before 12.0-62.10 Vulnerable ·Citrix
- cpe:2.3:h:citrix:application_delivery_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Citrix
- cpe:2.3:o:citrix:netscaler_gateway_firmware:*:*:*:*:*:*:*:* Versions 11.1 to before 11.1-63.9; 12.0 to before 12.0-62.10 Vulnerable ·Citrix
- cpe:2.3:h:citrix:netscaler_gateway:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Citrix
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-8187
- 2026-10-03 Alias added: GHSA-qq2f-8prw-23j6
References
More Citrix Application Delivery Controller Firmware vulnerabilities
- TI-2022-10528 Unauthenticated remote arbitrary code execution in Citrix Gateway, Citrix ADC KEVCVSS 3.1CRITICAL 9.8
- TI-2019-14254 An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5… KEVCVSS 3.1CRITICAL 9.8
- TI-2020-06613 Improper input validation in Citrix ADC, Citrix Gateway, Citrix SDWAN WAN-OP KEVCVSS 3.1MEDIUM 6.5
- TI-2020-06611 Improper access control in Citrix ADC, Citrix Gateway, Citrix SDWAN WAN-OP KEVCVSS 3.1MEDIUM 6.5
- TI-2020-06614 Improper access control in Citrix ADC, Citrix Gateway, Citrix SDWAN WAN-OP KEVCVSS 3.1MEDIUM 4.3
- TI-2018-05232 The AppFirewall functionality in Citrix NetScaler Application Delivery Controller and… CVSS 3.0CRITICAL 9.8
Sources
- CVE-2020-8187 · CVE Program
- CVE-2020-8187 · NVD
- FIRST EPSS
- GHSA-qq2f-8prw-23j6 · GitHub Advisory Database · CC BY 4.0
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