HIGHCVSS v3.1 7.5Actively exploited · CISA KEV since 2023-10-18Vulnerability

CVE-2023-4966

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.

Properties

Euvd product
NetScaler Gateway, NetScaler ADC
Vulnerability name
Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability
First seen
2026-07-31T03:55:28+00:00
Cvss score
7.5
Epss score
0.99999
Last seen
2026-10-19T12:00:27+00:00
Due date
2023-11-08
Euvd assigner
Citrix
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2023-10-18T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2023-10-18
Score
7.5
Euvd base score version
3.1
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
Citrix, Cloud Software Group
Cvss vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
In Signal since
initial import (Sep 2026)
Euvd base score
9.4

Related Entities (8)

AFFECTS_PRODUCT (4)

→[Product]cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*
→[Product]cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*
→[Product]cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
→[Product]cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*

DESCRIBES (1)

←[KEVEntry]Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability

HAS_WEAKNESS (1)

→[Weakness]Improper Restriction of Operations within the Bounds of a Memory Buffer

INVOLVES (1)

←[Signal]kev_added · 2023-10-18

MENTIONED_IN (1)

→[Campaign]CitrixBleed 2 (CVE-2025-5777) 7 Steps to Dragonforce Ransomware

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CVE-2023-4966 (CVSS v3.1 7.5) — Ninja Signal Threat Intelligence | Ninja Signal