CVE-2023-3519
Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 9 August 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Unauthenticated remote code execution
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 99.75% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 19 July 2023 · due 9 August 2023 · used in ransomware campaigns
- Weakness
- CWE-94
- Affected
- citrix/netscaler application delivery controller · citrix/netscaler gateway
- Source
- secure@citrix.com
EPSS 99.7% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. 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
References
- http://packetstormsecurity.com/files/173997/Citrix-ADC-NetScaler-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467Vendor Advisory
- http://packetstormsecurity.com/files/173997/Citrix-ADC-NetScaler-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-3519US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.