Overview
Citrix Application Delivery Controller (ADC) and Gateway, when configured with SAML SP or IdP configuration, contain an authentication bypass vulnerability that allows an attacker to execute code as administrator.
https://www.citrix.com/blogs/2022/12/13/critical-security-update-now-available-for-citrix-adc-citrix-gateway/; https://nvd.nist.gov/vuln/detail/CVE-2022-27518
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2022-27518 |
| Vendor / Product | Citrix — Application Delivery Controller (ADC) and Gateway |
| NVD Published | 2022-12-13 |
| NVD Last Modified | 2026-02-25 |
| CVSS 3.1 Score | 9.8 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Severity | CRITICAL |
| CWE | CWE-664 |
| CISA KEV Added | 2022-12-13 |
| CISA KEV Deadline | 2023-01-03 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2023-01-03.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2022-12-13 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2023-01-03 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2022-27518 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |