Uncontrolled resource consumption in Citrix ADC, Citrix Gateway, Citrix SDWAN
Priority LOW 35CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.
Summary
An uncontrolled resource consumption vulnerability exists in Citrix ADC <13.0-83.27, <12.1-63.22 and 11.1-65.23 that could allow an attacker with access to NSIP or SNIP with management interface access to cause a temporary disruption of the Management GUI, Nitro API, and RPC communication.
Why it matters now
EPSS 0.0092 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 SDWAN | Citrix ADC 11.1,12.1,13.0,13.1 | — | No fix listed | CNA |
- Citrix ADC, Citrix Gateway, Citrix SDWAN Vendor— Affected Citrix ADC 11.1,12.1,13.0,13.1 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:* | before 11.1-65.23; 12.1 to before 12.1-63.22; 13.0 to before 13.0-83.27 | Vulnerable | Citrix |
| cpe:2.3:h:citrix:application_delivery_controller:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Citrix |
| cpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:* | before 11.1-65.23; 12.1 to before 12.1-63.22; 13.0 to before 13.0-65.23 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:sd-wan:*:*:*:*:wanop:*:*:* | before 10.2.9c; 11.4.0 to before 11.4.2 | Vulnerable | Citrix |
- cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:* Versions before 11.1-65.23; 12.1 to before 12.1-63.22; 13.0 to before 13.0-83.27 Vulnerable ·Citrix
- cpe:2.3:h:citrix:application_delivery_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Citrix
- cpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:* Versions before 11.1-65.23; 12.1 to before 12.1-63.22; 13.0 to before 13.0-65.23 Vulnerable ·Citrix
- cpe:2.3:a:citrix:sd-wan:*:*:*:*:wanop:*:*:* Versions before 10.2.9c; 11.4.0 to before 11.4.2 Vulnerable ·Citrix
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-22956
- 2026-10-03 Alias added: GHSA-cvqf-ghwg-56gj
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-2021-22956 · CVE Program
- CVE-2021-22956 · NVD
- FIRST EPSS
- GHSA-cvqf-ghwg-56gj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences