NCSC-2026-0478

Vulnerability from csaf_ncscnl - Published: 2026-11-11 08:12 - Updated: 2026-11-11 08:12
Summary
Kwetsbaarheden verholpen in N-able N-central
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: N-able heeft meerdere kwetsbaarheden verholpen in N-able N-central. Deze kwetsbaarheden treffen versies ouder dan 2026.4.1.26.
Interpretaties: Er meerdere kwetsbaarheden met betrekking tot XML External Entity (XXE), waardoor de verwerking van XML-data mogelijk op ongewenste wijze kan worden beïnvloed. Daarnaast zijn er kwetsbaarheden in de vorm van OGNL Injection en Stored Cross-Site Scripting (XSS), waarbij kwaadaardige code kan worden geïnjecteerd en uitgevoerd binnen de webinterface, waaronder in de context van een administrator. Verder zijn er meerdere kwetsbaarheden die lokale privilege-escalatie mogelijk maken, waaronder via een onjuist beveiligde syslog-ng-configuratie en onveilige Inter-Process Communication (IPC)-kanalen. Ook is er sprake van een Server-Side Request Forgery (SSRF)-kwetsbaarheid via de validatie van schema-informatie bij het importeren van services. Ten slotte is een kwetsbaarheid vastgesteld in de verwerking van bestandspaden bij het uploaden naar de file repository, waarbij path traversal kan leiden tot Remote Code Execution (RCE).
Oplossingen: N-able heeft N-central 2026.4 HF2 (build 2026.4.1.26) uitgebracht, waarin de betreffende kwetsbaarheden zijn verholpen. Zie bijgevoegde referenties voor meer informatie.
Kans: medium
Schade: high
CWE-23: Relative Path Traversal
CWE-79: Improper Neutralization of Input During Web Page Generation
CWE-266: Incorrect Privilege Assignment
CWE-306: Missing Authentication for Critical Functionality
CWE-611: Improper Restriction of XML External Entity Reference
CWE-644: Improper Neutralization of HTTP Headers for Scripting Syntax
CWE-918: Server-Side Request Forgery
CVE-2026-125883

N-able N-central versions prior to 26.4.1 contain a vulnerability involving improper restriction of XML external entity references, resulting in XML Schema Poisoning.

CWE-611 - Improper Restriction of XML External Entity Reference
Affected products
Product Identifier Version Remediation
vers:unknown/*
N-able / N-central
 vers:unknown/*
CVE-2026-125878

N-able N-central versions prior to 26.4.1 are susceptible to cross-site scripting vulnerabilities caused by improper input neutralization during web page generation, potentially enabling resource injection attacks.

CWE-79 - Improper Neutralization of Input During Web Page Generation
Affected products
Known affected 1 product, the same list as for CVE-2026-125883
CVE-2026-125879

N-able N-central versions prior to 26.4.1 contain a vulnerability due to incorrect privilege assignment that enables privilege escalation.

CWE-266 - Incorrect Privilege Assignment
Affected products
Known affected 1 product, the same list as for CVE-2026-125883
CVE-2026-125880

N-able N-central versions prior to 26.4.1 are susceptible to Cross-Site Scripting (XSS) vulnerabilities due to inadequate neutralization of HTTP headers containing scripting syntax.

CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax
Affected products
Known affected 1 product, the same list as for CVE-2026-125883
CVE-2026-125881

N-able N-central versions prior to 26.4.1 contain a Server-Side Request Forgery (SSRF) vulnerability that could be exploited to manipulate server requests.

CWE-918 - Server-Side Request Forgery
Affected products
Known affected 1 product, the same list as for CVE-2026-125883
CVE-2026-125882

N-able N-central versions prior to 26.4.1 contain a relative path traversal vulnerability that enables attackers to perform path traversal attacks, potentially compromising system security.

CWE-23 - Relative Path Traversal
Affected products
Known affected 1 product, the same list as for CVE-2026-125883
CVE-2026-91000

A missing authentication vulnerability in N-able N-central versions prior to 2026.4.1 enables privilege escalation, potentially allowing unauthorized users to gain elevated access.

CWE-306 - Missing Authentication for Critical Functionality
Affected products
Known affected 1 product, the same list as for CVE-2026-125883
References
To clipboard 

{
  "document": {
    "category": "csaf_security_advisory",
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    "distribution": {
      "tlp": {
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    "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": "N-able heeft meerdere kwetsbaarheden verholpen in N-able N-central. Deze kwetsbaarheden treffen versies ouder dan 2026.4.1.26.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "Er meerdere kwetsbaarheden met betrekking tot XML External Entity (XXE), waardoor de verwerking van XML-data mogelijk op ongewenste wijze kan worden be\u00efnvloed. Daarnaast zijn er kwetsbaarheden in de vorm van OGNL Injection en Stored Cross-Site Scripting (XSS), waarbij kwaadaardige code kan worden ge\u00efnjecteerd en uitgevoerd binnen de webinterface, waaronder in de context van een administrator.\n\nVerder zijn er meerdere kwetsbaarheden die lokale privilege-escalatie mogelijk maken, waaronder via een onjuist beveiligde syslog-ng-configuratie en onveilige Inter-Process Communication (IPC)-kanalen. Ook is er sprake van een Server-Side Request Forgery (SSRF)-kwetsbaarheid via de validatie van schema-informatie bij het importeren van services. Ten slotte is een kwetsbaarheid vastgesteld in de verwerking van bestandspaden bij het uploaden naar de file repository, waarbij path traversal kan leiden tot Remote Code Execution (RCE).",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "N-able heeft N-central 2026.4 HF2 (build 2026.4.1.26) uitgebracht, waarin de betreffende kwetsbaarheden zijn verholpen. Zie bijgevoegde referenties voor meer informatie.",
        "title": "Oplossingen"
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      {
        "category": "general",
        "text": "Relative Path Traversal",
        "title": "CWE-23"
      },
      {
        "category": "general",
        "text": "Improper Neutralization of Input During Web Page Generation",
        "title": "CWE-79"
      },
      {
        "category": "general",
        "text": "Incorrect Privilege Assignment",
        "title": "CWE-266"
      },
      {
        "category": "general",
        "text": "Missing Authentication for Critical Functionality",
        "title": "CWE-306"
      },
      {
        "category": "general",
        "text": "Improper Restriction of XML External Entity Reference",
        "title": "CWE-611"
      },
      {
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        "text": "Improper Neutralization of HTTP Headers for Scripting Syntax",
        "title": "CWE-644"
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        "url": "https://status.n-able.com/2026/11/10/n-central-2026-4-hf2-release-notes/"
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    ],
    "title": "Kwetsbaarheden verholpen in N-able N-central",
    "tracking": {
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        "name": "Improper Restriction of XML External Entity Reference"
      },
      "notes": [
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          "category": "other",
          "text": "Improper Restriction of XML External Entity Reference",
          "title": "CWE-611"
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        {
          "category": "description",
          "text": "N-able N-central versions prior to 26.4.1 contain a vulnerability involving improper restriction of XML external entity references, resulting in XML Schema Poisoning.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
          "title": "CVSSV4"
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          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-125883.json"
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      ],
      "title": "CVE-2026-125883"
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          "text": "Improper Neutralization of Input During Web Page Generation",
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          "category": "description",
          "text": "N-able N-central versions prior to 26.4.1 are susceptible to cross-site scripting vulnerabilities caused by improper input neutralization during web page generation, potentially enabling resource injection attacks.",
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      ],
      "title": "CVE-2026-125878"
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          "text": "N-able N-central versions prior to 26.4.1 contain a vulnerability due to incorrect privilege assignment that enables privilege escalation.",
          "title": "Summary"
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    {
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        {
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          "title": "Summary"
        },
        {
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          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
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        }
      ],
      "title": "CVE-2026-125880"
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          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
          "title": "CVSSV4"
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          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-125881.json"
        }
      ],
      "title": "CVE-2026-125881"
    },
    {
      "cve": "CVE-2026-125882",
      "cwe": {
        "id": "CWE-23",
        "name": "Relative Path Traversal"
      },
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        {
          "category": "other",
          "text": "Relative Path Traversal",
          "title": "CWE-23"
        },
        {
          "category": "description",
          "text": "N-able N-central versions prior to 26.4.1 contain a relative path traversal vulnerability that enables attackers to perform path traversal attacks, potentially compromising system security.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
          "title": "CVSSV4"
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          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-125882.json"
        }
      ],
      "title": "CVE-2026-125882"
    },
    {
      "cve": "CVE-2026-91000",
      "cwe": {
        "id": "CWE-306",
        "name": "Missing Authentication for Critical Functionality"
      },
      "notes": [
        {
          "category": "other",
          "text": "Missing Authentication for Critical Functionality",
          "title": "CWE-306"
        },
        {
          "category": "description",
          "text": "A missing authentication vulnerability in N-able N-central versions prior to 2026.4.1 enables privilege escalation, potentially allowing unauthorized users to gain elevated access.",
          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
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        {
          "category": "self",
          "summary": "CVE-2026-91000 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-91000.json"
        }
      ],
      "title": "CVE-2026-91000"
    }
  ]
}



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