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TI-2025-05943 Aliases CVE-2025-6543GHSA-9gqr-6728-fpv3

Memory corruption in Citrix ADC

Priority CRITICAL 99Exploited in the wildCWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

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

Why it matters now

Exploitation Active In CISA KEV since 2025-06-30CISA due date 2025-07-21
EPSS 0.10433 95th percentileScored 2026-11-07
Fix Fixed ADC (NetScaler): 47.46, 59.19, 37.236Gateway (NetScaler): 47.46, 59.19, 37.236

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CitrixADC14.1 to before 47.46; 13.1 to before 59.19; 13.1 FIPS and NDcPP to before 37.23647.46, 59.19, 37.236Patch availableCNA
CitrixGateway14.1 to before 47.46; 13.1 to before 59.19; 13.1 FIPS and NDcPP to before 37.23647.46, 59.19, 37.236Patch availableCNA
  • ADC VendorCitrix Affected 14.1 to before 47.46; 13.1 to before 59.19; 13.1 FIPS and NDcPP to before 37.236 Fixed in 47.46, 59.19, 37.236 Patch available CNA
  • Gateway VendorCitrix Affected 14.1 to before 47.46; 13.1 to before 59.19; 13.1 FIPS and NDcPP to before 37.236 Fixed in 47.46, 59.19, 37.236 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*13.1 to before 13.1-37.236VulnerableCitrix
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*13.1 to before 13.1-37.236VulnerableCitrix
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*13.1 to before 13.1-59.19; 14.1 to before 14.1-47.46VulnerableCitrix
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*13.1 to before 13.1-59.19; 14.1 to before 14.1-47.46VulnerableCitrix
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* Versions 13.1 to before 13.1-37.236 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:* Versions 13.1 to before 13.1-37.236 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* Versions 13.1 to before 13.1-59.19; 14.1 to before 14.1-47.46 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* Versions 13.1 to before 13.1-59.19; 14.1 to before 14.1-47.46 Vulnerable ·Citrix

Remediation

  • Fix · CNA ADC (NetScaler) Fixed in 47.46, 59.19, 37.236
  • Fix · CNA Gateway (NetScaler) Fixed in 47.46, 59.19, 37.236

Timeline

  1. 2025-06-30 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2025-6543
  3. 2026-10-03 Alias added: GHSA-9gqr-6728-fpv3

References

Advisory 1

  • TI-2026-60195 Memory overflow vulnerability leading to Remote Code Execution or Denial of Service KEVCVSS 4.0CRITICAL 9.5
  • TI-2026-60194 Improper input validation in Citrix ADC KEVCVSS 4.0CRITICAL 9.5
  • TI-2023-04571 Unauthenticated sensitive information disclosure in Citrix NetScaler ADC KEVCVSS 3.1CRITICAL 9.4
  • TI-2023-03284 Unauthenticated remote code execution in Citrix NetScaler ADC KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-15872 NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-19490 KEVCVSS 4.0CRITICAL 9.3
  • TI-2026-02639 Insufficient input validation leading to memory overread KEVCVSS 4.0CRITICAL 9.3
See all 39 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences