NCSC-2026-0490

Vulnerability from csaf_ncscnl - Published: 2026-11-12 12:12 - Updated: 2026-11-12 12:12
Summary
Kwetsbaarheden verholpen in Fortinet FortiAuthenticator
Notes
The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.
Feiten: Fortinet heeft meerdere kwetsbaarheden verholpen in FortiAuthenticator versies 6.6.0 tot 6.6.10 en 8.0.0 tot 8.0.3.
Interpretaties: Meerdere kwetsbaarheden in FortiAuthenticator kunnen leiden tot ongeoorloofde toegang, informatielekken, code-uitvoering of uitval. Sommige zijn zonder account te misbruiken - Open redirect: doorsturen van gebruikers naar ongewenste websites. - Dienstverstoring: uitval door oneindige lussen of overbelasting. - Toegangscontrole: ongeoorloofde toegang door fouten in autorisatie en rechtenbeheer. - FSSO: buffer overflow in de authenticatieonderdelen. - LDAP- en SQL-injectie: manipuleren van directory- en databaseopdrachten. - Geheugenfouten: schrijven buiten geheugenbuffers en ongeldige geheugenverwijzingen. - Formatstringfout: onveilige verwerking van aangeleverde tekst. - Hardcoded wachtwoorden: misbruik van vaste, ingebouwde wachtwoorden.
Oplossingen: Fortinet heeft updates uitgebracht om de kwetsbaarheden in FortiAuthenticator te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Kans: medium
Schade: high
CWE-89: Improper Neutralization of Special Elements used in an SQL Command
CWE-90: Improper Neutralization of Special Elements used in an LDAP Query
CWE-121: Stack-based Buffer Overflow
CWE-134: Use of Externally-Controlled Format String
CWE-259: Use of Hard-coded Password
CWE-476: NULL Pointer Dereference
CWE-522: Insufficiently Protected Credentials
CWE-601: URL Redirection to Untrusted Site
CWE-770: Allocation of Resources Without Limits or Throttling
CWE-787: Out-of-bounds Write
CWE-835: Loop with Unreachable Exit Condition
CWE-863: Incorrect Authorization
CVE-2026-121526

Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 have an open redirect vulnerability enabling unauthenticated attackers to redirect users to malicious sites via crafted HTTP requests.

6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE-601 - URL Redirection to Untrusted Site
Affected products
Product Identifier Version Remediation
vers:unknown/*
Fortinet / FortiAuthenticator
 vers:unknown/*
CVE-2026-126237

A vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows denial of service via crafted TCP requests causing an infinite loop with no exit condition.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-835 - Loop with Unreachable Exit Condition
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126238

An incorrect authorization vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 enables unauthenticated attackers to bypass authorization checks and access restricted functionality.

8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
CWE-863 - Incorrect Authorization
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126239

A stack-based buffer overflow vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows unauthenticated attackers to crash the FSSO subsystem via crafted HTTP requests.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-121 - Stack-based Buffer Overflow
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126240

Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 contain an LDAP Injection vulnerability that may allow an authenticated attacker to bypass authentication via a malicious or misconfigured upstream IdP controlling NameID or SAML username attributes.

8.2 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C
CWE-90 - Improper Neutralization of Special Elements used in an LDAP Query
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126241

Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 contain an SQL Injection vulnerability (CWE-89) that allows an authenticated attacker to execute unauthorized SQL commands on the underlying database.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
CWE-89 - Improper Neutralization of Special Elements used in an SQL Command
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126242

An incorrect authorization vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows attackers to bypass authentication and gain unauthorized access, contingent on obtaining specific IDs and data through other means.

7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C
CWE-863 - Incorrect Authorization
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126243

An incorrect authorization vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows attackers to bypass authentication and gain unauthorized access, contingent on obtaining specific IDs and data through other means.

7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE-863 - Incorrect Authorization
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126244

Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 contain a vulnerability allowing unauthenticated attackers to exhaust system resources without limits or throttling, potentially causing a denial of service (DoS).

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
CWE-770 - Allocation of Resources Without Limits or Throttling
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126245

An out-of-bounds write vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 may enable unauthenticated attackers to execute unauthorized code via HTTP requests if ASLR protections are bypassed.

8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CWE-787 - Out-of-bounds Write
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126246

A null pointer dereference vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows unauthenticated attackers to cause denial of service via crafted HTTP requests.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:F/RL:O/RC:C
CWE-476 - NULL Pointer Dereference
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126247

A format string vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows authenticated privileged attackers to execute unauthorized code or commands via crafted HTTP requests.

7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE-134 - Use of Externally-Controlled Format String
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126248

A vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows unauthenticated attackers to access sensitive information via HTTPS requests due to insufficient credential protection.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C
CWE-522 - Insufficiently Protected Credentials
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126249

An improper privilege management vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows an authenticated attacker to escalate privileges.

7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126250

Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 contain an incorrect authorization vulnerability that allows unauthenticated attackers to cause denial of service via crafted HTTP requests.

8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H/E:F/RL:O/RC:C
CWE-863 - Incorrect Authorization
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126251

An Incorrect Authorization vulnerability (CWE-863) in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows attackers to bypass authentication and gain unauthorized access.

9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H/E:F/RL:O/RC:C
CWE-863 - Incorrect Authorization
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126252

Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 contain an SQL injection vulnerability that allows authenticated attackers to execute unauthorized commands via HTTP requests due to improper neutralization of SQL elements.

8.3 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L/E:P/RL:O/RC:C
CWE-89 - Improper Neutralization of Special Elements used in an SQL Command
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
CVE-2026-126257

A hard-coded password vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows unauthenticated attackers to bypass credential validation and gain unauthorized access under certain conditions.

9.0 (Critical)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
CWE-259 - Use of Hard-coded Password
Affected products
Known affected 1 product, the same list as for CVE-2026-121526
References
URL Category
https://fortiguard.fortinet.com/psirt/FG-IR-26-191 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-252 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-253 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-254 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-255 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-256 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-257 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-259 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-260 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-261 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-262 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-263 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-264 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-265 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-266 external
https://fortiguard.fortinet.com/psirt/FG-IR-26-271 external
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-… self
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{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "nl",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
      {
        "category": "description",
        "text": "Fortinet heeft meerdere kwetsbaarheden verholpen in FortiAuthenticator versies 6.6.0 tot 6.6.10 en 8.0.0 tot 8.0.3.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "Meerdere kwetsbaarheden in FortiAuthenticator kunnen leiden tot ongeoorloofde toegang, informatielekken, code-uitvoering of uitval. Sommige zijn zonder account te misbruiken\n\n- Open redirect: doorsturen van gebruikers naar ongewenste websites.\n- Dienstverstoring: uitval door oneindige lussen of overbelasting.\n- Toegangscontrole: ongeoorloofde toegang door fouten in autorisatie en rechtenbeheer.\n- FSSO: buffer overflow in de authenticatieonderdelen.\n- LDAP- en SQL-injectie: manipuleren van directory- en databaseopdrachten.\n- Geheugenfouten: schrijven buiten geheugenbuffers en ongeldige geheugenverwijzingen.\n- Formatstringfout: onveilige verwerking van aangeleverde tekst.\n- Hardcoded wachtwoorden: misbruik van vaste, ingebouwde wachtwoorden.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "Fortinet heeft updates uitgebracht om de kwetsbaarheden in FortiAuthenticator te verhelpen. Zie bijgevoegde referenties voor meer informatie.",
        "title": "Oplossingen"
      },
      {
        "category": "general",
        "text": "medium",
        "title": "Kans"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Schade"
      },
      {
        "category": "general",
        "text": "Improper Neutralization of Special Elements used in an SQL Command",
        "title": "CWE-89"
      },
      {
        "category": "general",
        "text": "Improper Neutralization of Special Elements used in an LDAP Query",
        "title": "CWE-90"
      },
      {
        "category": "general",
        "text": "Stack-based Buffer Overflow",
        "title": "CWE-121"
      },
      {
        "category": "general",
        "text": "Use of Externally-Controlled Format String",
        "title": "CWE-134"
      },
      {
        "category": "general",
        "text": "Use of Hard-coded Password",
        "title": "CWE-259"
      },
      {
        "category": "general",
        "text": "NULL Pointer Dereference",
        "title": "CWE-476"
      },
      {
        "category": "general",
        "text": "Insufficiently Protected Credentials",
        "title": "CWE-522"
      },
      {
        "category": "general",
        "text": "URL Redirection to Untrusted Site",
        "title": "CWE-601"
      },
      {
        "category": "general",
        "text": "Allocation of Resources Without Limits or Throttling",
        "title": "CWE-770"
      },
      {
        "category": "general",
        "text": "Out-of-bounds Write",
        "title": "CWE-787"
      },
      {
        "category": "general",
        "text": "Loop with Unreachable Exit Condition",
        "title": "CWE-835"
      },
      {
        "category": "general",
        "text": "Incorrect Authorization",
        "title": "CWE-863"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "cert@ncsc.nl",
      "name": "Nationaal Cyber Security Centrum",
      "namespace": "https://www.ncsc.nl/"
    },
    "references": [
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-191"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-252"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-253"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-254"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-255"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-256"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-257"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-259"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-260"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-261"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-262"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-263"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-264"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-265"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-266"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-271"
      }
    ],
    "title": "Kwetsbaarheden verholpen in Fortinet FortiAuthenticator",
    "tracking": {
      "current_release_date": "2026-11-12T12:12:02.891404Z",
      "generator": {
        "date": "2025-08-04T16:30:00Z",
        "engine": {
          "name": "V.A.",
          "version": "1.3"
        }
      },
      "id": "NCSC-2026-0490",
      "initial_release_date": "2026-11-12T12:12:02.891404Z",
      "revision_history": [
        {
          "date": "2026-11-12T12:12:02.891404Z",
          "number": "1.0.0",
          "summary": "Initiele versie"
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:unknown/*",
                "product": {
                  "name": "vers:unknown/*",
                  "product_id": "CSAFPID-1"
                }
              }
            ],
            "category": "product_name",
            "name": "FortiAuthenticator"
          }
        ],
        "category": "vendor",
        "name": "Fortinet"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-121526",
      "cwe": {
        "id": "CWE-601",
        "name": "URL Redirection to Untrusted Site"
      },
      "notes": [
        {
          "category": "other",
          "text": "URL Redirection to Untrusted Site",
          "title": "CWE-601"
        },
        {
          "category": "description",
          "text": "Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 have an open redirect vulnerability enabling unauthenticated attackers to redirect users to malicious sites via crafted HTTP requests.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-121526 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-121526.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-121526"
    },
    {
      "cve": "CVE-2026-126237",
      "cwe": {
        "id": "CWE-835",
        "name": "Loop with Unreachable Exit Condition"
      },
      "notes": [
        {
          "category": "other",
          "text": "Loop with Unreachable Exit Condition",
          "title": "CWE-835"
        },
        {
          "category": "description",
          "text": "A vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows denial of service via crafted TCP requests causing an infinite loop with no exit condition.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126237 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126237.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126237"
    },
    {
      "cve": "CVE-2026-126238",
      "cwe": {
        "id": "CWE-863",
        "name": "Incorrect Authorization"
      },
      "notes": [
        {
          "category": "other",
          "text": "Incorrect Authorization",
          "title": "CWE-863"
        },
        {
          "category": "description",
          "text": "An incorrect authorization vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 enables unauthenticated attackers to bypass authorization checks and access restricted functionality.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126238 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126238.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126238"
    },
    {
      "cve": "CVE-2026-126239",
      "cwe": {
        "id": "CWE-121",
        "name": "Stack-based Buffer Overflow"
      },
      "notes": [
        {
          "category": "other",
          "text": "Stack-based Buffer Overflow",
          "title": "CWE-121"
        },
        {
          "category": "description",
          "text": "A stack-based buffer overflow vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows unauthenticated attackers to crash the FSSO subsystem via crafted HTTP requests.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126239 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126239.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126239"
    },
    {
      "cve": "CVE-2026-126240",
      "cwe": {
        "id": "CWE-90",
        "name": "Improper Neutralization of Special Elements used in an LDAP Query"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Neutralization of Special Elements used in an LDAP Query",
          "title": "CWE-90"
        },
        {
          "category": "description",
          "text": "Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 contain an LDAP Injection vulnerability that may allow an authenticated attacker to bypass authentication via a malicious or misconfigured upstream IdP controlling NameID or SAML username attributes.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126240 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126240.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126240"
    },
    {
      "cve": "CVE-2026-126241",
      "cwe": {
        "id": "CWE-89",
        "name": "Improper Neutralization of Special Elements used in an SQL Command"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Neutralization of Special Elements used in an SQL Command",
          "title": "CWE-89"
        },
        {
          "category": "description",
          "text": "Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 contain an SQL Injection vulnerability (CWE-89) that allows an authenticated attacker to execute unauthorized SQL commands on the underlying database.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126241 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126241.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126241"
    },
    {
      "cve": "CVE-2026-126242",
      "cwe": {
        "id": "CWE-863",
        "name": "Incorrect Authorization"
      },
      "notes": [
        {
          "category": "other",
          "text": "Incorrect Authorization",
          "title": "CWE-863"
        },
        {
          "category": "description",
          "text": "An incorrect authorization vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows attackers to bypass authentication and gain unauthorized access, contingent on obtaining specific IDs and data through other means.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126242 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126242.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126242"
    },
    {
      "cve": "CVE-2026-126243",
      "cwe": {
        "id": "CWE-863",
        "name": "Incorrect Authorization"
      },
      "notes": [
        {
          "category": "other",
          "text": "Incorrect Authorization",
          "title": "CWE-863"
        },
        {
          "category": "description",
          "text": "An incorrect authorization vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows attackers to bypass authentication and gain unauthorized access, contingent on obtaining specific IDs and data through other means.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126243 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126243.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126243"
    },
    {
      "cve": "CVE-2026-126244",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "notes": [
        {
          "category": "other",
          "text": "Allocation of Resources Without Limits or Throttling",
          "title": "CWE-770"
        },
        {
          "category": "description",
          "text": "Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 contain a vulnerability allowing unauthenticated attackers to exhaust system resources without limits or throttling, potentially causing a denial of service (DoS).",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126244 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126244.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126244"
    },
    {
      "cve": "CVE-2026-126245",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "notes": [
        {
          "category": "other",
          "text": "Out-of-bounds Write",
          "title": "CWE-787"
        },
        {
          "category": "description",
          "text": "An out-of-bounds write vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 may enable unauthenticated attackers to execute unauthorized code via HTTP requests if ASLR protections are bypassed.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126245 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126245.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126245"
    },
    {
      "cve": "CVE-2026-126246",
      "cwe": {
        "id": "CWE-476",
        "name": "NULL Pointer Dereference"
      },
      "notes": [
        {
          "category": "other",
          "text": "NULL Pointer Dereference",
          "title": "CWE-476"
        },
        {
          "category": "description",
          "text": "A null pointer dereference vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows unauthenticated attackers to cause denial of service via crafted HTTP requests.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126246 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126246.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:F/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126246"
    },
    {
      "cve": "CVE-2026-126247",
      "cwe": {
        "id": "CWE-134",
        "name": "Use of Externally-Controlled Format String"
      },
      "notes": [
        {
          "category": "other",
          "text": "Use of Externally-Controlled Format String",
          "title": "CWE-134"
        },
        {
          "category": "description",
          "text": "A format string vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows authenticated privileged attackers to execute unauthorized code or commands via crafted HTTP requests.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126247 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126247.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126247"
    },
    {
      "cve": "CVE-2026-126248",
      "cwe": {
        "id": "CWE-522",
        "name": "Insufficiently Protected Credentials"
      },
      "notes": [
        {
          "category": "other",
          "text": "Insufficiently Protected Credentials",
          "title": "CWE-522"
        },
        {
          "category": "description",
          "text": "A vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows unauthenticated attackers to access sensitive information via HTTPS requests due to insufficient credential protection.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126248 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126248.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126248"
    },
    {
      "cve": "CVE-2026-126249",
      "notes": [
        {
          "category": "description",
          "text": "An improper privilege management vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows an authenticated attacker to escalate privileges.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126249 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126249.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126249"
    },
    {
      "cve": "CVE-2026-126250",
      "cwe": {
        "id": "CWE-863",
        "name": "Incorrect Authorization"
      },
      "notes": [
        {
          "category": "other",
          "text": "Incorrect Authorization",
          "title": "CWE-863"
        },
        {
          "category": "description",
          "text": "Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 contain an incorrect authorization vulnerability that allows unauthenticated attackers to cause denial of service via crafted HTTP requests.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126250 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126250.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H/E:F/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126250"
    },
    {
      "cve": "CVE-2026-126251",
      "cwe": {
        "id": "CWE-863",
        "name": "Incorrect Authorization"
      },
      "notes": [
        {
          "category": "other",
          "text": "Incorrect Authorization",
          "title": "CWE-863"
        },
        {
          "category": "description",
          "text": "An Incorrect Authorization vulnerability (CWE-863) in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows attackers to bypass authentication and gain unauthorized access.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126251 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126251.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H/E:F/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126251"
    },
    {
      "cve": "CVE-2026-126252",
      "cwe": {
        "id": "CWE-89",
        "name": "Improper Neutralization of Special Elements used in an SQL Command"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Neutralization of Special Elements used in an SQL Command",
          "title": "CWE-89"
        },
        {
          "category": "description",
          "text": "Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 contain an SQL injection vulnerability that allows authenticated attackers to execute unauthorized commands via HTTP requests due to improper neutralization of SQL elements.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126252 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126252.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126252"
    },
    {
      "cve": "CVE-2026-126257",
      "cwe": {
        "id": "CWE-259",
        "name": "Use of Hard-coded Password"
      },
      "notes": [
        {
          "category": "other",
          "text": "Use of Hard-coded Password",
          "title": "CWE-259"
        },
        {
          "category": "description",
          "text": "A hard-coded password vulnerability in Fortinet FortiAuthenticator versions 6.6.0 to 6.6.10 and 8.0.0 to 8.0.3 allows unauthenticated attackers to bypass credential validation and gain unauthorized access under certain conditions.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-126257 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-126257.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.0,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-126257"
    }
  ]
}



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Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    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.