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Findings

CVE-2026-3055

Citrix NetScaler Out-of-Bounds Read Vulnerability

Published Mar 23, 2026 · updated Jun 17, 2026 · 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.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 23, 2026 · Catalog

    Detected

    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.

  2. Mar 30, 2026 · CISA KEV

    Known exploited

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

  3. Apr 2, 2026 · CISA KEV

    Remediation due

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

  4. Jun 17, 2026 · Catalog

    Updated

    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.

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.

CISA due date Apr 2, 2026

Affected

  • cpe citrix/netscaler application delivery controllerversion unspecified
  • cpe citrix/netscaler gatewayversion unspecified
  • vendor Citrix NetScalerversion unspecified

Sources

  • CISA KEVCVE-2026-3055

    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.

    cisa.gov
  • CVE.orgCVE-2026-3055

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2026-3055

    30-day exploitation probability 4.0%

    first.org
  • Metasploit Modulesauxiliary_scanner/http/citrix_netscaler_cve_2026_3055

    Public module reference (normal). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDCVE-2026-3055

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

    nvd.nist.gov

References

CVE-2026-3055 · ZeroDay Findings