dbcve.org
Actively exploited in the wild. This CVE is on the CISA Known Exploited Vulnerabilities list — treat remediation as urgent. Federal remediation due by 2 Apr 2026.
Netscaler Application Delivery ControllerApplication · Citrix

CVE-2026-3055

CRITICAL · 9.8 CVSS v3.1 Published 2026-03-23
Fix available
A fix is available. Upgrade to 13.1-37.262 / 13.1-62.23 or later.
See remediation →
100/100
Remediation priority · Urgent
In the wild High EPSS Public exploit Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

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

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Memory overread vulnerability in Citrix NetScaler ADC and NetScaler Gateway due to insufficient input validation when configured as a SAML Identity Provider (IdP). The flaw allows an attacker to read memory contents beyond intended boundaries, potentially exposing sensitive data.

MitigationApply Citrix patches when available. If immediate patching is not possible, consider disabling SAML IdP functionality or placing affected systems behind additional network controls until remediation is possible.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Netscaler Application Delivery ControllerApplication
Affected:>= 13.1, < 13.1-37.262>= 13.1, < 13.1-62.23>= 14.1, < 14.1-60.58
Netscaler GatewayApplication
Affected:>= 13.1, < 13.1-62.23>= 14.1, < 14.1-60.58

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify NetScaler product type
    Access the NetScaler management interface or run 'show version' via CLI to determine if the device is NetScaler ADC or NetScaler Gateway
    Affected if Device is NetScaler ADC or NetScaler Gateway
  2. Determine installed NetScaler version
    Run 'show version' via NetScaler CLI or check the build number in the management console under System > Information
    Affected if Version is 13.1 build 37.262 or lower, OR 13.1 build 62.23 or lower, OR 14.1 build 60.58 or lower (for ADC); OR 13.1 build 62.23 or lower, OR 14.1 build 60.58 or lower (for Gateway)
  3. Check if SAML IDP is configured
    Run 'show samlIdpProfile' via NetScaler CLI or check the SAML IDP configuration in the management console under Traffic Management > SAML IDP
    Affected if SAML IDP profile is configured and enabled on the device

The system is affected if it is a NetScaler ADC or Gateway with a vulnerable version AND has SAML IDP functionality enabled.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 13.1-37.262 / 13.1-62.23 / 14.1-60.58 or later
Fixed in 13.1-37.26213.1-62.2314.1-60.58
Interim mitigation

Apply Citrix patches when available. If immediate patching is not possible, consider disabling SAML IdP functionality or placing affected systems behind additional network controls until remediation is possible.

Recommended fix High confidence

Upgrade to NetScaler ADC/Gateway 13.1-62.23 or later (13.1 branch) OR 14.1-60.58 or later (14.1 branch)

  1. 1. Identify the current NetScaler ADC or Gateway version using 'show version' or the management console
  2. 2. Confirm the device is configured as a SAML IDP (check SAML IDP profiles in configuration)
  3. 3. Download the appropriate fixed build from Citrix support: for 13.1 branch use 13.1-62.23 or later, for 14.1 branch use 14.1-60.58 or later
  4. 4. Apply the upgrade following Citrix upgrade documentation - backup configuration first using 'save config' and 'create backup'
  5. 5. After upgrade, verify the SAML IDP functionality is working correctly
  6. 6. Monitor for any post-upgrade issues and confirm the version is correct using 'show version'
Caveat Standard NetScaler upgrade precautions apply - review Citrix release notes for known issues and ensure configuration compatibility before upgrading production systems

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Netscaler Application Delivery Controller Exploited in the wild — priority engagement
  • Consultation4.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,480
Get it fixed fast

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,968.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2026-3055 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-3055 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data