EUVD Vulnerability Catalog Actively Exploited (KEV)

EUVD-2026-40307

Severity: HIGH Base Score: 8.8 CVSS Version: 4.0

Vulnerability Description

Memory overflow vulnerability NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if the appliance is configured as a Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server

CVSS Vector Analysis

Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:L/SI:L/SA:L

▪ Attack Vector (AV): Network

▪ Attack Complexity (AC): Low

▪ Attack Requirements (AT): None

▪ Privileges Required (PR): None

▪ User Interaction (UI): None

▪ Vulnerability Confidentiality Impact (VC): High

▪ Vulnerability Integrity Impact (VI): Low

▪ Vulnerability Availability Impact (VA): High

▪ Subsequent Confidentiality Impact (SC): Low

▪ Subsequent Integrity Impact (SI): Low

▪ Subsequent Availability Impact (SA): Low

Affected Vendors & Systems

Vendor NetScaler

References & Advisory Links

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604

Metadata Profile

Database Authority

European Union Agency for Cybersecurity (ENISA) EUVD

Assigner

NetScaler

EPSS Probability

1.04

Known Aliases

CVE-2026-8452 GHSA-r7wg-r5wj-c765

Published On

2026-06-30

Last Updated

2026-08-26

Exploited Since

2026-08-26