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VULNERABILITIES

CVE-2025-6543 Details

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

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-6543 CISA-ADPUS Government Resource
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788 [email protected]Vendor Advisory

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability NameDate AddedDue DateRequired Action
Citrix NetScaler ADC and Gateway Buffer Overflow VulnerabilityJun 30, 2025Jul 21, 2025Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Weakness Enumeration

CWE-IDCWE NameSource
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer[email protected]

Affected Products

ProductVersions
citrix netscaler application delivery controller
>= 13.1, < 13.1-37.236
>= 13.1, < 13.1-59.19
>= 14.1, < 14.1-47.46

CPE

  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*

Remediation

  • No remediation found in references.
citrix netscaler gateway
>= 13.1, < 13.1-59.19
>= 14.1, < 14.1-47.46

CPE

  • cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

9 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2025-6543
NVD Published Date:
Jun 25, 2025
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]