CVE-2023-4966

CRITICALCVSS 9.4Known Exploited

CISA Known Exploited Vulnerability

https://www.netscaler.com/blog/news/cve-2023-4966-critical-security-update-now-available-for-netscaler-adc-and-netscaler-gateway/, https://support.citrix.com/article/CTX579459/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20234966-and-cve20234967 ; https://nvd.nist.gov/vuln/detail/CVE-2023-4966

Remediation deadline: November 8, 2023

Ransomware use: Known

Description

Citrix NetScaler ADC and NetScaler Gateway contain a buffer overflow vulnerability that allows for sensitive information disclosure when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.

Timeline

Published:October 10th, 2023 2:15 PM

Last modified:July 31st, 2026 4:16 AM

Added to KEV:October 18th, 2023

CVSS Scoring

CVSS v3: 9.4 (CRITICAL)

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

Affected Software

From NVD CPE configuration data

Vendors

citrix

Products

netscaler_application_delivery_controllernetscaler_gateway

Weaknesses (CWE)

CWE-119

References & Reports

Advisories, patches, and third-party reports

Source: NIST NVD · Data may lag official sources by up to one minute