WID-SEC-W-2026-3587

Vulnerability from csaf_certbund - Published: 2026-09-27 22:00 - Updated: 2026-09-28 22:00
Summary
Citrix NetScaler ADC und Citrix NetScaler Gateway: Mehrere Schwachstellen
Severity
Kritisch
Notes
Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.
Produktbeschreibung: Citrix NetScaler ist eine integrierte Lösung für die Beschleunigung, das Traffic Management und die Sicherheit von Web-Applikationen. Citrix Access Gateway ist ein universell einsetzbares SSL-VPN. Advanced Access Control (AAC) ermöglichen es Administratoren, Zugriffsregeln für das Access Gateway festzulegen.
Angriff: Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Citrix NetScaler ADC und Citrix NetScaler Gateway ausnutzen, um beliebigen Code auszuführen, einen Denial-of-Service-Zustand auszulösen, Daten zu manipulieren, Sicherheitsmaßnahmen zu umgehen und weitere, nicht näher bezeichnete Auswirkungen zu erzielen.
Betroffene Betriebssysteme: - Appliance - Hardware Appliance
CVE-2026-88773
Affected products
Product Identifier Version Remediation
Citrix Systems NetScaler ADC <14.1-73.37
Citrix Systems / NetScaler
 ADC <14.1-73.37
Citrix Systems NetScaler Gateway <13.1-64.23
Citrix Systems / NetScaler
 Gateway <13.1-64.23
Citrix Systems NetScaler ADC NDcPP <13.1-37.279
Citrix Systems / NetScaler
 ADC NDcPP <13.1-37.279
Citrix Systems NetScaler ADC FIPS <14.1-73.37
Citrix Systems / NetScaler
 ADC FIPS <14.1-73.37
Citrix Systems NetScaler Gateway <14.1-73.37
Citrix Systems / NetScaler
 Gateway <14.1-73.37
Citrix Systems NetScaler ADC <13.1-64.23
Citrix Systems / NetScaler
 ADC <13.1-64.23
Citrix Systems NetScaler ADC FIPS <13.1-37.279
Citrix Systems / NetScaler
 ADC FIPS <13.1-37.279
CVE-2026-88774
Affected products
Known affected 7 products, the same list as for CVE-2026-88773
CVE-2026-88775
Affected products
Known affected 7 products, the same list as for CVE-2026-88773
CVE-2026-88776
Affected products
Known affected 7 products, the same list as for CVE-2026-88773
CVE-2026-88777
Affected products
Known affected 7 products, the same list as for CVE-2026-88773
CVE-2026-88778
Affected products
Known affected 7 products, the same list as for CVE-2026-88773
CVE-2026-88771
Affected products
Known affected 7 products, the same list as for CVE-2026-88773
CVE-2026-88772
Affected products
Known affected 7 products, the same list as for CVE-2026-88773
References
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "text": "kritisch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Citrix NetScaler ist eine integrierte L\u00f6sung f\u00fcr die Beschleunigung, das Traffic Management und die Sicherheit von Web-Applikationen. Citrix Access Gateway ist ein universell einsetzbares SSL-VPN. Advanced Access Control (AAC) erm\u00f6glichen es Administratoren, Zugriffsregeln f\u00fcr das Access Gateway festzulegen.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Citrix NetScaler ADC und Citrix NetScaler Gateway ausnutzen, um beliebigen Code auszuf\u00fchren, einen Denial-of-Service-Zustand auszul\u00f6sen, Daten zu manipulieren, Sicherheitsma\u00dfnahmen zu umgehen und weitere, nicht n\u00e4her bezeichnete Auswirkungen zu erzielen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Appliance\n- Hardware Appliance",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-3587 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3587.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-3587 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3587"
      },
      {
        "category": "external",
        "summary": "Citrix Security Bulletin CTX697096 vom 2026-09-27",
        "url": "https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096"
      },
      {
        "category": "external",
        "summary": "Citrix NetScaler ADC and Citrix NetScaler Gateway Security Bulletin for CVE-2026-88771 through CVE-2026-88778 vom 2026-09-27",
        "url": "https://community.citrix.com/techzone-blogs/110_security-updates/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve-2026-88771-through-cve-2026-88778/"
      },
      {
        "category": "external",
        "summary": "CERT-EU: 2026-014: Critical Vulnerabilities in Citrix NetScaler ADC and Gateway vom 2026-09-27",
        "url": "https://cert.europa.eu/publications/security-advisories/2026-014/"
      },
      {
        "category": "external",
        "summary": "Inside the NetScaler Zero-Day Siege: Chained Pre-Auth RCEs Weaponized in the Wild vom 2026-09-27",
        "url": "https://sh3llc0d3.com/blog/inside-the-netscaler-zero-day-siege-chained-pre-auth-rces-weaponized-in-the-wild-watchtowr-disclosure/#heading-3"
      },
      {
        "category": "external",
        "summary": "Watchtowr Labs vom 2026-09-28",
        "url": "https://labs.watchtowr.com/oh-look-the-foot-gun-went-off-again-citrix-netscaler-preauth-command-injection-cve-2026-88771/"
      }
    ],
    "source_lang": "en-US",
    "title": "Citrix NetScaler ADC und Citrix NetScaler Gateway: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2026-09-28T22:00:00.000+00:00",
      "generator": {
        "date": "2026-09-29T09:36:32.649+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-3587",
      "initial_release_date": "2026-09-27T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-09-27T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-09-28T22:00:00.000+00:00",
          "number": "2",
          "summary": "Informationen von WatchTower Labs aufgenommen"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "ADC \u003c14.1-73.37",
                "product": {
                  "name": "Citrix Systems NetScaler ADC \u003c14.1-73.37",
                  "product_id": "T060229"
                }
              },
              {
                "category": "product_version",
                "name": "ADC 14.1-73.37",
                "product": {
                  "name": "Citrix Systems NetScaler ADC 14.1-73.37",
                  "product_id": "T060229-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:citrix:netscaler:adc__14.1-73.37"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "ADC FIPS \u003c14.1-73.37",
                "product": {
                  "name": "Citrix Systems NetScaler ADC FIPS \u003c14.1-73.37",
                  "product_id": "T060231"
                }
              },
              {
                "category": "product_version",
                "name": "ADC FIPS 14.1-73.37",
                "product": {
                  "name": "Citrix Systems NetScaler ADC FIPS 14.1-73.37",
                  "product_id": "T060231-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:citrix:netscaler:adc_fips__14.1-73.37"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "ADC NDcPP \u003c13.1-37.279",
                "product": {
                  "name": "Citrix Systems NetScaler ADC NDcPP \u003c13.1-37.279",
                  "product_id": "T060232"
                }
              },
              {
                "category": "product_version",
                "name": "ADC NDcPP 13.1-37.279",
                "product": {
                  "name": "Citrix Systems NetScaler ADC NDcPP 13.1-37.279",
                  "product_id": "T060232-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:citrix:netscaler:adc_ndcpp__13.1-37.279"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "ADC FIPS \u003c13.1-37.279",
                "product": {
                  "name": "Citrix Systems NetScaler ADC FIPS \u003c13.1-37.279",
                  "product_id": "T060233"
                }
              },
              {
                "category": "product_version",
                "name": "ADC FIPS 13.1-37.279",
                "product": {
                  "name": "Citrix Systems NetScaler ADC FIPS 13.1-37.279",
                  "product_id": "T060233-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:citrix:netscaler:adc_fips__13.1-37.279"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "ADC \u003c13.1-64.23",
                "product": {
                  "name": "Citrix Systems NetScaler ADC \u003c13.1-64.23",
                  "product_id": "T060234"
                }
              },
              {
                "category": "product_version",
                "name": "ADC 13.1-64.23",
                "product": {
                  "name": "Citrix Systems NetScaler ADC 13.1-64.23",
                  "product_id": "T060234-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:citrix:netscaler:adc__13.1-64.23"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "Gateway \u003c14.1-73.37",
                "product": {
                  "name": "Citrix Systems NetScaler Gateway \u003c14.1-73.37",
                  "product_id": "T060236"
                }
              },
              {
                "category": "product_version",
                "name": "Gateway 14.1-73.37",
                "product": {
                  "name": "Citrix Systems NetScaler Gateway 14.1-73.37",
                  "product_id": "T060236-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:citrix:netscaler:gateway__14.1-73.37"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "Gateway \u003c13.1-64.23",
                "product": {
                  "name": "Citrix Systems NetScaler Gateway \u003c13.1-64.23",
                  "product_id": "T060238"
                }
              },
              {
                "category": "product_version",
                "name": "Gateway 13.1-64.23",
                "product": {
                  "name": "Citrix Systems NetScaler Gateway 13.1-64.23",
                  "product_id": "T060238-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:citrix:netscaler:gateway__13.1-64.23"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "NetScaler"
          }
        ],
        "category": "vendor",
        "name": "Citrix Systems"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-88773",
      "product_status": {
        "known_affected": [
          "T060229",
          "T060238",
          "T060232",
          "T060231",
          "T060236",
          "T060234",
          "T060233"
        ]
      },
      "release_date": "2026-09-27T22:00:00.000+00:00",
      "title": "CVE-2026-88773"
    },
    {
      "cve": "CVE-2026-88774",
      "product_status": {
        "known_affected": [
          "T060229",
          "T060238",
          "T060232",
          "T060231",
          "T060236",
          "T060234",
          "T060233"
        ]
      },
      "release_date": "2026-09-27T22:00:00.000+00:00",
      "title": "CVE-2026-88774"
    },
    {
      "cve": "CVE-2026-88775",
      "product_status": {
        "known_affected": [
          "T060229",
          "T060238",
          "T060232",
          "T060231",
          "T060236",
          "T060234",
          "T060233"
        ]
      },
      "release_date": "2026-09-27T22:00:00.000+00:00",
      "title": "CVE-2026-88775"
    },
    {
      "cve": "CVE-2026-88776",
      "product_status": {
        "known_affected": [
          "T060229",
          "T060238",
          "T060232",
          "T060231",
          "T060236",
          "T060234",
          "T060233"
        ]
      },
      "release_date": "2026-09-27T22:00:00.000+00:00",
      "title": "CVE-2026-88776"
    },
    {
      "cve": "CVE-2026-88777",
      "product_status": {
        "known_affected": [
          "T060229",
          "T060238",
          "T060232",
          "T060231",
          "T060236",
          "T060234",
          "T060233"
        ]
      },
      "release_date": "2026-09-27T22:00:00.000+00:00",
      "title": "CVE-2026-88777"
    },
    {
      "cve": "CVE-2026-88778",
      "product_status": {
        "known_affected": [
          "T060229",
          "T060238",
          "T060232",
          "T060231",
          "T060236",
          "T060234",
          "T060233"
        ]
      },
      "release_date": "2026-09-27T22:00:00.000+00:00",
      "title": "CVE-2026-88778"
    },
    {
      "cve": "CVE-2026-88771",
      "product_status": {
        "known_affected": [
          "T060229",
          "T060238",
          "T060232",
          "T060231",
          "T060236",
          "T060234",
          "T060233"
        ]
      },
      "release_date": "2026-09-27T22:00:00.000+00:00",
      "title": "CVE-2026-88771"
    },
    {
      "cve": "CVE-2026-88772",
      "product_status": {
        "known_affected": [
          "T060229",
          "T060238",
          "T060232",
          "T060231",
          "T060236",
          "T060234",
          "T060233"
        ]
      },
      "release_date": "2026-09-27T22:00:00.000+00:00",
      "title": "CVE-2026-88772"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.