CVE-2023-3519

Name: CVE-2023-3519
Creator: NVD / NIST
Published: 2023-07-19T18:15:11.513+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 99.44%

Last modified Jun 17, 2026

CVE-2023-3519 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Unauthenticated remote code execution. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.44% chance of exploitation in the next 30 days.

Description

Unauthenticated remote code execution

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

99.44%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Aug 9, 2023.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Citrix	Netscaler Application Delivery Controller	>= 12.1, < 12.1-55.297
Citrix	Netscaler Application Delivery Controller	>= 13.0, < 13.0-91.13
Citrix	Netscaler Application Delivery Controller	>= 13.1, < 13.1-37.159
Citrix	Netscaler Application Delivery Controller	>= 13.1, < 13.1-49.13
Citrix	Netscaler Gateway	>= 13.0, < 13.0-91.13
Citrix	Netscaler Gateway	>= 13.1, < 13.1-49.13

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

Timeline

Published: Jul 19, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-3519?

Unauthenticated remote code execution

How severe is CVE-2023-3519?

CVE-2023-3519 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 99.44% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2023-3519?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-3519?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST