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CVE-2023-3519: Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability

criticalknown exploitedpublic exploitCVE-2023-3519
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Citrix NetScaler ADC and NetScaler Gateway contains a code injection vulnerability that allows for unauthenticated remote code execution.

CSIRTS triage

vendor: Citrixproduct: NetScaler ADCRemote code execution
What
A code injection vulnerability allows for unauthenticated remote code execution.
Who is affected
Deployments of Citrix NetScaler ADC and NetScaler Gateway.
Urgency
Remediation is critical as the vulnerability is actively exploited.
Action
Patch the affected systems as per Citrix's guidance.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2023-07-19
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-3519

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2023-3519coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Citrix NetScaler ADC

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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