#VU124257 Out-of-bounds read in Citrix Netscaler ADC and Citrix NetScaler Gateway - CVE-2026-3055
Published: March 23, 2026 / Updated: April 1, 2026
Vulnerability identifier: #VU124257
Vulnerability risk: Critical
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:A/U:Red
CVE-ID: CVE-2026-3055
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
Citrix Netscaler ADC
Citrix NetScaler Gateway
Citrix Netscaler ADC
Citrix NetScaler Gateway
Software vendor:
Citrix
Citrix
Description
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a boundary condition in SAML IDP. A remote attacker can send a specially crafted request the appliance, trigger an out-of-bounds read error and read contents of memory on the system.
Successful exploitation of the vulnerability may lead to full system compromise.
Remediation
Install updates from vendor's website.