CVEvulnerability

CVE-2026-3055

9.3 CRITICAL Known exploited Published 2026-03-23 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Citrix NetScaler Out-of-Bounds Read Vulnerability — Citrix NetScaler

Citrix NetScaler ADC (formerly Citrix ADC), NetScaler Gateway (formerly Citrix Gateway) and NetScaler ADC FIPS and NDcPP contain an out-of-bounds reads vulnerability when configured as a SAML IDP leading to memory overread.

Added to KEV: 2026-03-30
Remediation due: 2026-04-02
Ransomware use: Unknown
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes: https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300&articleURL=NetScaler_ADC_and_NetScaler_Gateway_Security_Bulletin_for_CVE_2026_3055_and_CVE_2026_4368 ; https://nvd.nist.gov/vuln/detail/CVE-2026-3055

Status: Analyzed
Published: 2026-03-23
Last modified: 2026-06-17
Assigner: 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5
CVSS 4.0 (50a63c94-1ea7-4568-8c11-eb79e7c5a2b5): 9.3 CRITICAL — CVSS:4.0/AV:N/AC:L/AT:N/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
CVSS 3.1 ([email protected]): 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses: CWE-125

Description

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

Affected configurations

• citrix netscaler application delivery controller (>= 13.1 < 13.1-37.262) • citrix netscaler application delivery controller (>= 13.1 < 13.1-62.23) • citrix netscaler application delivery controller (>= 14.1 < 14.1-60.58) • citrix netscaler gateway (>= 13.1 < 13.1-62.23) • citrix netscaler gateway (>= 14.1 < 14.1-60.58)

Weakness · CWE (1)

CWE-125 Out-of-bounds Read weakness

References