Overview
Citrix NetScaler ADC and NetScaler Gateway contains a code injection vulnerability that allows for unauthenticated remote code execution.
https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467; https://nvd.nist.gov/vuln/detail/CVE-2023-3519
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2023-3519 |
| Vendor / Product | Citrix — NetScaler ADC and NetScaler Gateway |
| NVD Published | 2023-07-19 |
| NVD Last Modified | 2025-10-24 |
| 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-94 |
| CISA KEV Added | 2023-07-19 |
| CISA KEV Deadline | 2023-08-09 |
| Known Ransomware Use | ⚠️ Yes |
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: 2023-08-09.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Timeline
| Date | Event |
|---|---|
| 2023-07-19 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2023-08-09 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2023-3519 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |