HIGHCVSS v3.1 7.5Actively exploited · CISA KEV since 2024-01-17Vulnerability

CVE-2023-6549

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

Properties

Euvd product
NetScaler ADC
Vulnerability name
Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability
First seen
2025-10-21T23:05:27+00:00
Cvss score
7.5
Epss score
0.57633
Last seen
2026-10-19T12:00:27+00:00
Due date
2024-02-07
Euvd assigner
Citrix
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2024-01-17T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2024-01-17
Score
7.5
Euvd base score version
3.1
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
Cloud Software Group, Citrix
Cvss vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
8.2

Related Entities (7)

AFFECTS_PRODUCT (4)

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

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 · 2024-01-17

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CVE-2023-6549 (CVSS v3.1 7.5) — Ninja Signal Threat Intelligence | Ninja Signal