CVE-2025-6543

June 26, 2025, 6:57 p.m.

9.2
Critical

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

Product(s) Impacted

Vendor Product Versions
Citrix
  • Netcaler Adc
  • Netcaler Gateway
  • *
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a citrix netcaler_adc / / / / / / / /
a citrix netcaler_gateway / / / / / / / /

References

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788

Tags

CWE-119
secure@citrix.com
2025-06-25
CVE-2025-6543

CVSS Score

9.2 / 10

CVSS Data - 4.0

  • Attack Vector: NETWORK
  • Attack Complexity: HIGH
  • Attack Requirements: PRESENT
  • Privileges Required: NONE
  • User Interaction: NONE
  • Scope:
  • Confidentiality Impact: HIGH
  • Integrity Impact: HIGH
  • Availability Impact: HIGH
  • Exploit Maturity: NOT_DEFINED

    • CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

    View Vector String

Timeline

Published: June 25, 2025, 1:15 p.m.
Last Modified: June 26, 2025, 6:57 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

secure@citrix.com

Linked Attack Reports

What happened in Vegas (that you actually want to know about)

This article recaps key highlights from Black Hat USA, including Joe Marshall's live incident-response exercise using the Backdoors & Breaches card game, Amy Chang's research on bypassing AI guardrails through 'decomposition', and Philippe Laulheret's ReVault presentation on vulnerabilities in embe…
malvertising
powershell
c#
CVE-2025-6543
ps1bot
2025-08-14
embedded security
ai guardrails
incident-response
black hat usa
Published: August 14, 2025
Linked vulnerabilities : CVE-2025-6543 (CVSS 9.2)
Downloadable IOCs: 3

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.