Citrix · Application Delivery Controller (ADC) and Gateway
CVE-2022-27518
Unauthenticated remote arbitrary code execution
Exploited in attacks
Critical 9.8 Attack chance: 6.9%
What it is
Unauthenticated remote arbitrary code execution
CISA: 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.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: January 3, 2023
- Added to the CISA list
- December 13, 2022
- Published
- December 13, 2022
- Severity
- Critical 9.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 6.9% in the top 6.0% of all known vulnerabilities
- Weakness
- CWE-664
- More details
- NVD · CVE.org · CISA
All references (1)
More exploited flaws from Citrix
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Oct 4, 2026 | Improper Restriction of Operations within the Bounds of a Memory Buffer | NetScaler | High 8.7 | 11% |
| Sep 27, 2026 | Improper Input Validation | NetScaler | Critical 9.5 | 82% |
| Sep 27, 2026 | Improper Restriction of Operations within the Bounds of a Memory Buffer | NetScaler | Critical 9.5 | 78% |
| Sep 9, 2026 | Authentication Bypass Using an Alternate Path or Channel | NetScaler | Critical 9.3 | 33% |
| Aug 26, 2026 | Improper Restriction of Operations within the Bounds of a Memory Buffer | NetScaler ADC and NetScaler Gateway | High 8.8 | 1.0% |
| Mar 30, 2026 | Out-of-Bounds Read | NetScaler | Critical 9.3 | 91% |
| Aug 26, 2025 | Memory Overflow | NetScaler | Critical 9.2 | 21% |
| Aug 25, 2025 | Improper Privilege Management | Session Recording | Medium 5.1 | 3.5% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.