# CVE-2022-27518: Citrix Application Delivery Controller (ADC) and Gateway Authentication Bypass Vulnerability

Source: https://junglewise.ai/threats/cve-2022-27518-citrix-application-delivery-controller-adc-and-gateway  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-12-13. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2022-27518 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-12-13

Citrix ADC and Gateway, when configured as a SAML Service Provider or Identity Provider, contain an authentication bypass vulnerability. An unauthenticated remote attacker can exploit this to achieve arbitrary code execution with administrator privileges.

Technologies: [Citrix Application Delivery Controller (ADC)](https://junglewise.ai/threats/technologies/application-delivery-controller-adc), [Citrix Gateway](https://junglewise.ai/threats/technologies/gateway). Vendors: [Citrix](https://junglewise.ai/threats/vendors/citrix).

## Quick answers

**Is CVE-2022-27518 exploited in the wild?** Yes. CVE-2022-27518 is known to be exploited in the wild, first recorded on 13 December 2022. Treat it as urgent.

**How severe is CVE-2022-27518?** Critical severity, with a CVSS score of 9.8, published 13 December 2022.

**Which products and versions are affected?** Citrix Application Delivery Controller (ADC) Firmware 12.1 (including) up to 12.1-65.25 (excluding); 13.0 (including) up to 13.0-58.32 (excluding); Citrix Gateway Firmware 12.1 (including) up to 12.1-65.25 (excluding); 13.0 (including) up to 13.0-58.32 (excluding).

**Is there a fix for CVE-2022-27518?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2022-27518 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2022-27518?** Check whether you run Citrix Application Delivery Controller (ADC), Citrix Gateway or Citrix NetScaler Gateway. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Citrix Application Delivery Controller (ADC) Firmware 12.1 (including) up to 12.1-65.25 (excluding); 13.0 (including) up to 13.0-58.32 (excluding)
- Citrix Gateway Firmware 12.1 (including) up to 12.1-65.25 (excluding); 13.0 (including) up to 13.0-58.32 (excluding)

## Timeline

- 2022-12-13: disclosed
- 2022-12-13: advisory: Vendor advisory CTX474995 published
- 2022-12-13: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2022-12-13: exploited: Reported as exploited in the wild at time of disclosure

## Related threats

- [Citrix NetScaler ADC memory overflow in LDAP authentication](https://junglewise.ai/threats/cve-2026-111342-memory-overflow-in-ldap-authentication-can-lead-to-unpredictable)
- [Citrix NetScaler memory overflow in client-certificate authentication](https://junglewise.ai/threats/cve-2026-111341-memory-overflow-in-client-certificate-authentication-can-lead-to)
- [Citrix NetScaler memory overflow in KBA authentication](https://junglewise.ai/threats/cve-2026-111340-memory-overflow-in-kba-knowledge-based-authentication-can-lead)
- [Citrix NetScaler ADC memory overflow in Email OTP authentication](https://junglewise.ai/threats/cve-2026-107415-memory-overflow-in-email-otp-authentication-can-lead-to)
- [Citrix NetScaler ADC memory overflow in WebAuth authentication](https://junglewise.ai/threats/cve-2026-107414-memory-overflow-in-webauth-authentication-can-lead-to)