NCSC-2026-0386

Vulnerability from csaf_ncscnl - Published: 2026-09-22 14:39 - Updated: 2026-09-22 14:39
Summary
Kwetsbaarheid verholpen in F5 Networks BIG-IP Access Policy Manager
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: F5 Networks heeft een kwetsbaarheid verholpen in BIG-IP Access Policy Manager (APM).
Interpretaties: De kwetsbaarheid stelt een ongeauthenticeerde kwaadwillende in staat om malafide code uit te voeren. Hiertoe dient de kwaadwillende malafide netwerkverkeer naar het kwetsbare systeem te versturen. BIG-IP APM-systemen zijn alleen kwetsbaar wanneer een access policy en een OAuth-profiel op de virtuele server zijn geconfigureerd. F5 Networks geeft aan dat het een zeroday-kwetsbaarheid is die actief wordt misbruikt.
Oplossingen: F5 Networks heeft updates uitgebracht om de kwetsbaarheid te verhelpen. Ook heeft F5 indicators-of-compromise (IOC's) gepubliceerd. Het NCSC adviseert organisaties met klem om kwetsbare systemen op aanwezigheid van deze IOC's te controleren alvorens de beveiligingsupdates worden geïnstalleerd. Met het oog op actief misbruik van de kwetsbaarheid, raad het NCSC aan om dit zo spoedig mogelijk te doen. Voor organisaties die niet in de gelegenheid zijn om de updates op korte termijn te installeren, heeft F5 Networks andere mitigerende maatregelen beschikbaar. Lees het beveiligingsadvies van F5 Networks voor meer informatie.
Kans: high
Schade: high
CWE-122: Heap-based Buffer Overflow
CVE-2026-94127

A configuration combining BIG-IP APM access policy and an OAuth profile on a virtual server can be exploited by malicious traffic to achieve remote code execution.

9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-122 - Heap-based Buffer Overflow
Affected products
Product Identifier Version Remediation
vers:unknown/*
F5 / BIG-IP (APM)
 vers:unknown/*
References
To clipboard 

{
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        "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": "F5 Networks heeft een kwetsbaarheid verholpen in BIG-IP Access Policy Manager (APM).",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "De kwetsbaarheid stelt een ongeauthenticeerde kwaadwillende in staat om malafide code uit te voeren. Hiertoe dient de kwaadwillende malafide netwerkverkeer naar het kwetsbare systeem te versturen. BIG-IP APM-systemen zijn alleen kwetsbaar wanneer een access policy en een OAuth-profiel op de virtuele server zijn geconfigureerd.\n\nF5 Networks geeft aan dat het een zeroday-kwetsbaarheid is die actief wordt misbruikt.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "F5 Networks heeft updates uitgebracht om de kwetsbaarheid te verhelpen. Ook heeft F5 indicators-of-compromise (IOC\u0027s) gepubliceerd. Het NCSC adviseert organisaties met klem om kwetsbare systemen op aanwezigheid van deze IOC\u0027s te controleren alvorens de beveiligingsupdates worden ge\u00efnstalleerd. Met het oog op actief misbruik van de kwetsbaarheid, raad het NCSC aan om dit zo spoedig mogelijk te doen.\n\nVoor organisaties die niet in de gelegenheid zijn om de updates op korte termijn te installeren, heeft F5 Networks andere mitigerende maatregelen beschikbaar. Lees het beveiligingsadvies van F5 Networks voor meer informatie.",
        "title": "Oplossingen"
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      }
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      "namespace": "https://www.ncsc.nl/"
    },
    "references": [
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://my.f5.com/manage/s/article/K000162605"
      }
    ],
    "title": "Kwetsbaarheid verholpen in F5 Networks BIG-IP Access Policy Manager",
    "tracking": {
      "current_release_date": "2026-09-22T14:39:41.437874Z",
      "generator": {
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          "title": "CWE-122"
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          "text": "A configuration combining BIG-IP APM access policy and an OAuth profile on a virtual server can be exploited by malicious traffic to achieve remote code execution.",
          "title": "Summary"
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          "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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      "title": "CVE-2026-94127"
    }
  ]
}



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