CVE-2023-4967

Name: CVE-2023-4967
Creator: NVD / NIST
Published: 2023-10-27T19:15:41.62+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.88%

Last modified Jun 17, 2026

CVE-2023-4967 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Denial of Service in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA Virtual Server. EPSS estimates a 0.88% chance of exploitation in the next 30 days.

Description

Denial of Service in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA Virtual Server

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.88%

54.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Citrix	Netscaler Application Delivery Controller	>= 13.0, < 13.0-92.19
Citrix	Netscaler Application Delivery Controller	>= 13.1, < 13.1-49.15
Citrix	Netscaler Application Delivery Controller	>= 14.1, < 14.1-8.50
Citrix	Netscaler Gateway	>= 13.0, < 13.0-92.19
Citrix	Netscaler Gateway	>= 13.1, < 13.1-49.15
Citrix	Netscaler Gateway	>= 14.1, < 14.1-8.50
Citrix	Netscaler Application Delivery Controller	>= 12.1, <= 12.1-55.300
Citrix	Netscaler Application Delivery Controller	>= 13.1, <= 13.1-37.164

References

https://support.citrix.com/article/CTX579459/Vendor Advisory
https://support.citrix.com/article/CTX579459/Vendor Advisory

Timeline

Published: Oct 27, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-4967?

Denial of Service in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA Virtual Server

How severe is CVE-2023-4967?

CVE-2023-4967 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.88% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4967?

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-2023-4967?

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

Scan your code now

Source: NVD / NIST