CVE-2026-3055

CRITICAL CISA KEV EPSS 99.7%
Published Mar 23, 20263mo ago · Modified Jun 17, 20262w ago
9.3 CVSS 4.0
Critical
Find Similar
Published Mar 23, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago
KEV Listed Mar 30, 2026 3mo ago
KEV Due Apr 2, 2026 90d overdue

Description

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

CVSS Details

Base Score
9.3
Exploitability
—
Impact
—
Vector string
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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

CISA Known Exploited Overdue 90d
Added
Mar 30, 2026
Due
Apr 2, 2026

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

EPSS Exploit Probability
99.7% percentile
Exploit & Patch Status
Actively Exploited (KEV)
No Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 6

VendorProductVersionRange
citrixnetscaler_application_delivery_controller*≥13.1  –  <13.1-37.262
citrixnetscaler_application_delivery_controller*≥13.1  –  <13.1-37.262
citrixnetscaler_application_delivery_controller*≥13.1  –  <13.1-62.23
citrixnetscaler_application_delivery_controller*≥14.1  –  <14.1-60.58
citrixnetscaler_gateway*≥13.1  –  <13.1-62.23
citrixnetscaler_gateway*≥14.1  –  <14.1-60.58

References 3

  • labs.watchtowr.com https://labs.watchtowr.com/please-we-beg-just-one-weekend-free-of-appliances-citrix-netscaler-cve-2026-3055-memory-overread-part-2/
    ExploitThird Party Advisory
  • support.citrix.com https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300
    Vendor Advisory
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3055
    US Government Resource

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.