CVE-2022-27518: in the CISA KEV catalogue
Citrix Application Delivery Controller (ADC) and Gateway Authentication Bypass Vulnerability. CISA added CVE-2022-27518 to the Known Exploited Vulnerabilities catalogue on 2022-12-13 with a default due date of 2023-01-03. Known ransomware campaign use: Unknown. Forensic triage flag: No.
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. (CISA description)
- Vendor / product
- Citrix Application Delivery Controller (ADC) and Gateway
- CWE
- CWE-664
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 6.9%, percentile 94 (scored 2026-11-03)
EPSS puts about 6.9 in 100 odds (6.9%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 94% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2022-27518 in the CISA KEV catalogue?
Yes. CISA added CVE-2022-27518 (Citrix Application Delivery Controller (ADC) and Gateway Authentication Bypass Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2022-12-13. CISA's default due date for it is 2023-01-03.
Is CVE-2022-27518 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2022-27518. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2022-27518?
CISA's required action: Apply updates per vendor instructions.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2022-27518