CVE-2026-88776

Published Sep 27, 2026

Last updated 4 hours ago

Citrix NetScaler ADC

Citrix NetScaler Gateway

Overview

AI description

Automated description summarized from trusted sources.

CVE-2026-88776 is identified as a memory overflow vulnerability impacting Citrix NetScaler ADC and Citrix NetScaler Gateway products. This flaw can result in unpredictable or erroneous behavior, or a Denial of Service (DoS) condition. The vulnerability affects various versions of Citrix NetScaler ADC and Gateway, specifically ADC versions before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP. Citrix NetScaler Gateway versions before 14.1-73.37 and before 13.1-64.23 are also susceptible.

Description: Memory overflow vulnerability vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to unpredictable or erroneous behavior or Denial of Service
Source: 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5
NVD status: Modified
Products: netscaler_application_delivery_controller, netscaler_gateway

Risk scores

CVSS 4.0

Type: Secondary
Base score: 8.8
Impact score: -
Exploitability score: -
Vector string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/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
Severity: HIGH

CVSS 3.1

Type: Primary
Base score: 9.8
Impact score: 5.9
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: CRITICAL

Weaknesses

nvd@nist.gov: CWE-119
134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-119

Hype score is a measure of social media activity compared against trending CVEs from the past 12 months. Max score 100.

Hype score: 3

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*",
            "matchCriteriaId": "6BC2D462-9ABE-4024-8E46-8D265C0B19FB",
            "versionEndExcluding": "13.1-64.23",
            "versionStartIncluding": "13.1",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*",
            "matchCriteriaId": "2DB314FE-3886-4ABD-A820-B8A70EBB23A6",
            "versionEndExcluding": "13.1.37.279",
            "versionStartIncluding": "13.1",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*",
            "matchCriteriaId": "FCFFA1B3-87CE-4CC8-990E-D3CE0B55CD45",
            "versionEndExcluding": "13.1.37.279",
            "versionStartIncluding": "13.1",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*",
            "matchCriteriaId": "1CA9588A-E3EB-44FC-9515-6EB89BB8C1D6",
            "versionEndExcluding": "14.1-73.37",
            "versionStartIncluding": "14.1",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*",
            "matchCriteriaId": "046FF602-D956-4961-89BF-2041A3590004",
            "versionEndIncluding": "14.1-73.37",
            "versionStartIncluding": "14.1-66.68",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "3286D2C3-EA7E-4D9C-95DE-05D462DC8B1B",
            "versionEndExcluding": "13.1-64.23",
            "versionStartIncluding": "13.1",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "C77243A7-1FDB-4557-88BE-EDF3BAA56A81",
            "versionEndExcluding": "14.1-73.37",
            "versionStartIncluding": "14.1",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.