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TI-2023-06001 Aliases CVE-2023-6549GHSA-8fxh-p33g-qf5m

Memory corruption in Citrix NetScaler ADC

Priority CRITICAL 93Exploited in the wildCWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Improper Restriction of Operations within the Bounds of a Memory Buffer in NetScaler ADC and NetScaler Gateway allows Unauthenticated Denial of Service and Out-Of-Bounds Memory Read

Why it matters now

Exploitation Active In CISA KEV since 2024-01-17CISA due date 2024-02-07
EPSS 0.57633 99th percentileScored 2026-11-07
Fix Fixed NetScaler ADC (Cloud Software Group): 12.35, 51.15, 92.21 +2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
CitrixNetScaler ADC14.1 to before 12.35; 13.1 to before 51.15; 13.0 to before 92.21; 13.1-FIPS to before 37.176; 12.1-FIPS to before 55.302; 12.1-NDcPP to before 55.30212.35, 51.15, 92.21, 37.176, 55.302Patch availableCNA
  • NetScaler ADC VendorCitrix Affected 14.1 to before 12.35; 13.1 to before 51.15; 13.0 to before 92.21; 13.1-FIPS to before 37.176; 12.1-FIPS to before 55.302; 12.1-NDcPP to before 55.302 Fixed in 12.35, 51.15, 92.21, 37.176, 55.302 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*12.1 to before 12.1-55.302VulnerableCitrix
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*12.1 to before 12.1-55.302VulnerableCitrix
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*13.0 to before 13.0-92.21VulnerableCitrix
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*13.1 to before 13.1-37.176VulnerableCitrix
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*13.1 to before 13.1-51.15; 14.1 to before 14.1-12.35VulnerableCitrix
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*13.0 to before 13.0-92.21; 13.1 to before 13.1-51.15; 14.1 to before 14.1-12.35VulnerableCitrix
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* Versions 12.1 to before 12.1-55.302 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:* Versions 12.1 to before 12.1-55.302 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* Versions 13.0 to before 13.0-92.21 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* Versions 13.1 to before 13.1-37.176 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* Versions 13.1 to before 13.1-51.15; 14.1 to before 14.1-12.35 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* Versions 13.0 to before 13.0-92.21; 13.1 to before 13.1-51.15; 14.1 to before 14.1-12.35 Vulnerable ·Citrix

Remediation

  • Fix · CNA NetScaler ADC (Cloud Software Group) Fixed in 12.35, 51.15, 92.21, 37.176, 55.302

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Cloud Software Group NetScaler ADC 12.35, 37.176 and 3 more versions

    2 records Highest priority Priority CRITICAL 2 CRITICAL

    Other records, highest priority first

    • TI-2023-06000 Code injection in Citrix NetScaler ADCPriority CRITICAL 97
    Show all 2 records →

Timeline

  1. 2024-01-17 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2023-6549
  3. 2026-10-03 Alias added: GHSA-8fxh-p33g-qf5m

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