NCSC-2026-0040

Vulnerability from csaf_ncscnl - Published: 2026-01-27 10:51 - Updated: 2026-01-27 10:51
Summary
Kwetsbaarheid verholpen in SmarterTools SmarterMail

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
SmarterTools heeft kwetsbaarheden verholpen in SmarterMail.
Interpretaties
Een kwaadwillende kan de kwetsbaarheden misbruiken om authenticatie te omzeilen en willekeurige code uit te voeren met rechten van de beheerder, en mogelijk SYSTEM. Voor succesvol misbruik moet de kwaadwillende toegang hebben tot de API-interface (met name de `/api/v1/auth/force-reset-password` endpoint) en kan op die manier zonder voorafgaande authenticatie het wachtwoord van een beheerder resetten door middel van een speciaal geprepareerd HTTP-verzoek. Ook kan een kwaadwillende een malafide HTTP-server inrichten, om daarmee een slachtoffer te misleiden deze te bezoeken en zo willekeurige code uit te voeren op de kwetsbare server. Voor de kwetsbaarheid met kenmerk CVE-2026-23760 is Proof-of-Concept-code gepubliceerd en het Amerikaanse CISA heeft de kwetsbaarheid op de Known Exploited Vulnerabilities-lijst geplaatst, wat aangeeft dat de kwetsbaarheid actief is misbruikt.
Oplossingen
SmarterTools heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie. Het NCSC adviseert onderzoek te doen naar de SmarterMail-omgeving en met name te controleren of van beheerdersaccounts recentelijk het wachtwoord is gewijzigd.
Kans
high
Schade
high
CWE-288
Authentication Bypass Using an Alternate Path or Channel
CWE-306
Missing Authentication for Critical Function
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": "SmarterTools heeft kwetsbaarheden verholpen in SmarterMail.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "Een kwaadwillende kan de kwetsbaarheden misbruiken om authenticatie te omzeilen en willekeurige code uit te voeren met rechten van de beheerder, en mogelijk SYSTEM.\n\nVoor succesvol misbruik moet de kwaadwillende toegang hebben tot de API-interface (met name de `/api/v1/auth/force-reset-password` endpoint) en kan op die manier zonder voorafgaande authenticatie het wachtwoord van een beheerder resetten door middel van een speciaal geprepareerd HTTP-verzoek. Ook kan een kwaadwillende een malafide HTTP-server inrichten, om daarmee een slachtoffer te misleiden deze te bezoeken en zo willekeurige code uit te voeren op de kwetsbare server.\n\nVoor de kwetsbaarheid met kenmerk CVE-2026-23760 is Proof-of-Concept-code gepubliceerd en het Amerikaanse CISA heeft de kwetsbaarheid op de Known Exploited Vulnerabilities-lijst geplaatst, wat aangeeft dat de kwetsbaarheid actief is misbruikt.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "SmarterTools heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.\n\nHet NCSC adviseert onderzoek te doen naar de SmarterMail-omgeving en met name te controleren of van beheerdersaccounts recentelijk het wachtwoord is gewijzigd.",
        "title": "Oplossingen"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Kans"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Schade"
      },
      {
        "category": "general",
        "text": "Authentication Bypass Using an Alternate Path or Channel",
        "title": "CWE-288"
      },
      {
        "category": "general",
        "text": "Missing Authentication for Critical Function",
        "title": "CWE-306"
      }
    ],
    "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://www.smartertools.com/smartermail/release-notes/current"
      }
    ],
    "title": "Kwetsbaarheid verholpen in SmarterTools SmarterMail",
    "tracking": {
      "current_release_date": "2026-01-27T10:51:39.476320Z",
      "generator": {
        "date": "2025-08-04T16:30:00Z",
        "engine": {
          "name": "V.A.",
          "version": "1.3"
        }
      },
      "id": "NCSC-2026-0040",
      "initial_release_date": "2026-01-27T10:51:39.476320Z",
      "revision_history": [
        {
          "date": "2026-01-27T10:51:39.476320Z",
          "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": "SmarterMail"
          }
        ],
        "category": "vendor",
        "name": "SmarterTools"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-23760",
      "cwe": {
        "id": "CWE-288",
        "name": "Authentication Bypass Using an Alternate Path or Channel"
      },
      "notes": [
        {
          "category": "other",
          "text": "Authentication Bypass Using an Alternate Path or Channel",
          "title": "CWE-288"
        },
        {
          "category": "description",
          "text": "SmarterTools SmarterMail versions prior to build 9511 have a critical authentication bypass vulnerability in the password reset API, allowing unauthorized attackers to reset admin accounts and gain full access.",
          "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"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-23760 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-23760.json"
        }
      ],
      "title": "CVE-2026-23760"
    },
    {
      "cve": "CVE-2026-24423",
      "cwe": {
        "id": "CWE-306",
        "name": "Missing Authentication for Critical Function"
      },
      "notes": [
        {
          "category": "other",
          "text": "Missing Authentication for Critical Function",
          "title": "CWE-306"
        },
        {
          "category": "description",
          "text": "SmarterTools SmarterMail versions prior to build 9511 are vulnerable to unauthenticated remote code execution through the ConnectToHub API via a malicious HTTP server.",
          "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "title": "CVSSV4"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-24423 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-24423.json"
        }
      ],
      "title": "CVE-2026-24423"
    }
  ]
}


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Sightings

Author Source Type Date

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.



Detection rules are retrieved from Rulezet.