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TI-2026-02639 Aliases CVE-2026-3055GHSA-wv7p-q4p2-p6pf

Insufficient input validation leading to memory overread

Priority CRITICAL 99Exploited in the wildCWE-125Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread

Why it matters now

Exploitation Active In CISA KEV since 2026-03-30CISA due date 2026-04-02
EPSS 0.91491 99th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed ADC (NetScaler): 66.59, 62.23, 37.262Gateway (NetScaler): 66.59, 62.23

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
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 66.59; 13.1 to before 62.23; 13.1 FIPS and NDcPP to before 37.26266.59, 62.23, 37.262Patch availableCNA
CitrixGateway14.1 to before 66.59; 13.1 to before 62.2366.59, 62.23Patch availableCNA
  • ADC VendorCitrix Affected 14.1 to before 66.59; 13.1 to before 62.23; 13.1 FIPS and NDcPP to before 37.262 Fixed in 66.59, 62.23, 37.262 Patch available CNA
  • Gateway VendorCitrix Affected 14.1 to before 66.59; 13.1 to before 62.23 Fixed in 66.59, 62.23 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*13.1 to before 13.1-37.262VulnerableCitrix
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*13.1 to before 13.1-37.262VulnerableCitrix
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*13.1 to before 13.1-62.23; 14.1 to before 14.1-60.58VulnerableCitrix
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*13.1 to before 13.1-62.23; 14.1 to before 14.1-60.58VulnerableCitrix
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* Versions 13.1 to before 13.1-37.262 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:* Versions 13.1 to before 13.1-37.262 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* Versions 13.1 to before 13.1-62.23; 14.1 to before 14.1-60.58 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* Versions 13.1 to before 13.1-62.23; 14.1 to before 14.1-60.58 Vulnerable ·Citrix

Remediation

  • Fix · CNA ADC (NetScaler) Fixed in 66.59, 62.23, 37.262
  • Fix · CNA Gateway (NetScaler) Fixed in 66.59, 62.23

Timeline

  1. 2026-03-30 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2026-3055
  3. 2026-10-03 Alias added: GHSA-wv7p-q4p2-p6pf
  4. 2026-10-25 EPSS moved to the 99th percentile and above

References

Exploit 1

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-2025-07100 Memory corruption in Citrix ADC KEVCVSS 4.0CRITICAL 9.2
See all 39 →

Sources

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