CVE-2025-6543

CRITICALCISA KEV

9.8

Description

Memory overflow vulnerability leading to unintended control flow and Denial of Service in NetScaler ADC and NetScaler Gateway when configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published6/25/2025

Last Modified10/24/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorCitrix

ProductNetScaler ADC and Gateway

Vulnerability NameCitrix NetScaler ADC and Gateway Buffer Overflow Vulnerability

KEV Date Added2025-06-30

Remediation Due Date2025-07-21

Ransomware UseUnknown

Affected Products

citrix:netscaler_application_delivery_controllercitrix:netscaler_gateway

Weaknesses (CWE)

CWE-119

References

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788(secure@citrix.com)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-6543(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.