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Critical 9.8Known exploited (CISA KEV)Published Jul 19, 2023
CVE-2023-3519Unauthenticated remote code execution
Updated under an hour ago ()
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It affects Citrix NetScaler ADC and 2 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jul 19, 2023; federal agencies had to remediate by Aug 9, 2023, and it is known to be used in ransomware. Treat that date as your deadline.
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Unauthenticated remote code execution
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-94
- Known exploited
- Added to CISA KEV Jul 19, 2023; federal remediation due Aug 9, 2023; known ransomware useApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 99.75% (percentile 100)
- Assigned by
- Citrix
- NVD analysis
- Analyzed
- Record last updated
- Aug 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Citrix NetScaler ADC citrix:netscaler_adc (from the name) | from 13.1 before 49.13; from 13.0 before 91.13; from 13.1-FIPS before 37.159; from 12.1-FIPS before 55.297; from 12.1-NDcPP before 55.297 | CNA record |
Citrix NetScaler Gateway citrix:netscaler_gateway (from the name) | from 13.1 before 49.13; from 13.0 before 91.13 | CNA record |
citrix netscaler_application_delivery_controller citrix:netscaler_application_delivery_controller | from 12.1 before 12.1-55.297; from 12.1 before 12.1-55.297; from 13.0 before 13.0-91.13; from 13.1 before 13.1-37.159; from 13.1 before 13.1-49.13 | NVD |
citrix netscaler_gateway citrix:netscaler_gateway | from 13.0 before 13.0-91.13; from 13.1 before 13.1-49.13 | NVD |
References
- 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://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-3519us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.