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Review reviewHigh

CVE-2026-8451

NetScaler ADC, Gateway, netscaler application delivery controller

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

CVSS
8.8
EPSS
0.50%
39.5% percentile
CISA KEV
Not listed
Published
2026.06.30
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.50%
Technical severityCVSS 8.8

Vulnerability overview

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

Affected product and versions

Product
NetScaler ADC, Gateway, netscaler application delivery controller
Affected versions
14.1, 13.1, 14.1 FIPs, 13.1 FIPS and NDcPP, < 13.1-37.272, >= 13.1 < 13.1-63.18, >= 14.1 < 14.1-72.61, 14.1-66.68
Fixed versions
13.1-37.272, 13.1-63.18, 14.1-72.61

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that NetScaler ADC, Gateway, netscaler application delivery controller and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N/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
CWE
CWE-125