NCSC-2026-0335

Vulnerability from csaf_ncscnl - Published: 2026-09-01 13:25 - Updated: 2026-09-01 13:25
Summary
Kwetsbaarheden verholpen in WatchGuard Fireware OS
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: WatchGuard heeft kwetsbaarheden verholpen in WatchGuard Fireware OS, specifiek in het iked-proces en de epm-service van het Mobile Security onderdeel.
Interpretaties: De kwetsbaarheden bevinden zich in het iked-proces en de epm-service van WatchGuard Fireware OS. Het iked-proces bevat een stack-based buffer overflow, een type confusion kwetsbaarheid en een heap overflow. Deze kwetsbaarheden kunnen worden misbruikt door een ongeauthenticeerde aanvaller door speciaal vervaardigd netwerkverkeer te verzenden. Dit kan leiden tot het uitvoeren van willekeurige code met de privileges van het iked-proces, waardoor volledige controle over het systeem mogelijk kan worden. Daarnaast bevat de epm-service, die onderdeel is van het verouderde Mobile Security-component, een stack-based buffer overflow. Ook deze kwetsbaarheid kan door een ongeauthenticeerde aanvaller worden misbruikt om willekeurige code uit te voeren en daarmee controle over het systeem te verkrijgen.
Oplossingen: WatchGuard heeft updates uitgebracht om de kwetsbaarheden in Fireware OS te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Kans: medium
Schade: high
CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-121: Stack-based Buffer Overflow
CWE-122: Heap-based Buffer Overflow
CWE-125: Out-of-bounds Read
CWE-129: Improper Validation of Array Index
CWE-190: Integer Overflow or Wraparound
CWE-191: Integer Underflow (Wrap or Wraparound)
CWE-763: Release of Invalid Pointer or Reference
CWE-787: Out-of-bounds Write
CWE-798: Use of Hard-coded Credentials
CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2026-19318

A stack-based buffer overflow vulnerability in the WatchGuard Fireware OS iked process allows remote unauthenticated attackers to execute arbitrary code via specially crafted network traffic.

CWE-121 - Stack-based Buffer Overflow
Affected products
Product Identifier Version Remediation
vers:unknown/*
WatchGuard / Firebox
 vers:unknown/*
vers:unknown/*
WatchGuard / Fireware OS
 vers:unknown/*
CVE-2026-19315

A type confusion vulnerability in the iked process of WatchGuard Fireware OS allows remote unauthenticated attackers to execute arbitrary code via specially crafted network traffic.

CWE-125 - Out-of-bounds Read
Affected products
Product Identifier Version Remediation
vers:unknown/*
WatchGuard / Firebox
 vers:unknown/*
vers:unknown/*
WatchGuard / Fireware OS
 vers:unknown/*
CVE-2026-19313

A heap overflow vulnerability in the WatchGuard Fireware OS iked process allows remote unauthenticated attackers to execute arbitrary code via specially crafted network traffic.

CWE-122 - Heap-based Buffer Overflow
Affected products
Product Identifier Version Remediation
vers:unknown/*
WatchGuard / Firebox
 vers:unknown/*
vers:unknown/*
WatchGuard / Fireware OS
 vers:unknown/*
CVE-2026-13086

A stack-based buffer overflow vulnerability in the epm service of the deprecated Mobile Security feature in WatchGuard Fireware OS allows unauthenticated remote attackers to execute arbitrary code.

CWE-121 - Stack-based Buffer Overflow
Affected products
Product Identifier Version Remediation
vers:unknown/*
WatchGuard / Firebox
 vers:unknown/*
vers:unknown/*
WatchGuard / Fireware OS
 vers:unknown/*
References
To clipboard 

{
  "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": "WatchGuard heeft kwetsbaarheden verholpen in WatchGuard Fireware OS, specifiek in het iked-proces en de epm-service van het Mobile Security onderdeel.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "De kwetsbaarheden bevinden zich in het iked-proces en de epm-service van WatchGuard Fireware OS. Het iked-proces bevat een stack-based buffer overflow, een type confusion kwetsbaarheid en een heap overflow. Deze kwetsbaarheden kunnen worden misbruikt door een ongeauthenticeerde aanvaller door speciaal vervaardigd netwerkverkeer te verzenden. Dit kan leiden tot het uitvoeren van willekeurige code met de privileges van het iked-proces, waardoor volledige controle over het systeem mogelijk kan worden.\n\nDaarnaast bevat de epm-service, die onderdeel is van het verouderde Mobile Security-component, een stack-based buffer overflow. Ook deze kwetsbaarheid kan door een ongeauthenticeerde aanvaller worden misbruikt om willekeurige code uit te voeren en daarmee controle over het systeem te verkrijgen.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "WatchGuard heeft updates uitgebracht om de kwetsbaarheden in Fireware OS te verhelpen. Zie bijgevoegde referenties voor meer informatie.",
        "title": "Oplossingen"
      },
      {
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        "text": "medium",
        "title": "Kans"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Schade"
      },
      {
        "category": "general",
        "text": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
        "title": "CWE-120"
      },
      {
        "category": "general",
        "text": "Stack-based Buffer Overflow",
        "title": "CWE-121"
      },
      {
        "category": "general",
        "text": "Heap-based Buffer Overflow",
        "title": "CWE-122"
      },
      {
        "category": "general",
        "text": "Out-of-bounds Read",
        "title": "CWE-125"
      },
      {
        "category": "general",
        "text": "Improper Validation of Array Index",
        "title": "CWE-129"
      },
      {
        "category": "general",
        "text": "Integer Overflow or Wraparound",
        "title": "CWE-190"
      },
      {
        "category": "general",
        "text": "Integer Underflow (Wrap or Wraparound)",
        "title": "CWE-191"
      },
      {
        "category": "general",
        "text": "Release of Invalid Pointer or Reference",
        "title": "CWE-763"
      },
      {
        "category": "general",
        "text": "Out-of-bounds Write",
        "title": "CWE-787"
      },
      {
        "category": "general",
        "text": "Use of Hard-coded Credentials",
        "title": "CWE-798"
      },
      {
        "category": "general",
        "text": "Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)",
        "title": "CWE-843"
      }
    ],
    "publisher": {
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      "contact_details": "cert@ncsc.nl",
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        "url": "https://psirt.watchguard.com/CVE-2026-13086"
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        "summary": "Reference",
        "url": "https://psirt.watchguard.com/CVE-2026-19313"
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        "summary": "Reference",
        "url": "https://psirt.watchguard.com/CVE-2026-19315"
      },
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://psirt.watchguard.com/CVE-2026-19318"
      }
    ],
    "title": "Kwetsbaarheden verholpen in WatchGuard Fireware OS",
    "tracking": {
      "current_release_date": "2026-09-01T13:25:56.324480Z",
      "generator": {
        "date": "2025-08-04T16:30:00Z",
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          "category": "other",
          "text": "Stack-based Buffer Overflow",
          "title": "CWE-121"
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          "title": "Summary"
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          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
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          "title": "Summary"
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        }
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          "title": "Summary"
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        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
          "title": "CVSSV4"
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          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-19313.json"
        }
      ],
      "title": "CVE-2026-19313"
    },
    {
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        "name": "Stack-based Buffer Overflow"
      },
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        {
          "category": "other",
          "text": "Stack-based Buffer Overflow",
          "title": "CWE-121"
        },
        {
          "category": "other",
          "text": "Out-of-bounds Write",
          "title": "CWE-787"
        },
        {
          "category": "other",
          "text": "Use of Hard-coded Credentials",
          "title": "CWE-798"
        },
        {
          "category": "description",
          "text": "A stack-based buffer overflow vulnerability in the epm service of the deprecated Mobile Security feature in WatchGuard Fireware OS allows unauthenticated remote attackers to execute arbitrary code.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
          "title": "CVSSV4"
        }
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          "summary": "CVE-2026-13086 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-13086.json"
        }
      ],
      "title": "CVE-2026-13086"
    }
  ]
}



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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.


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