NCSC-2026-0223

Vulnerability from csaf_ncscnl - Published: 2026-07-10 05:54 - Updated: 2026-07-10 05:54
Summary
Kwetsbaarheden verholpen in BeyondTrust Remote Support en Privileged Remote Access
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: BeyondTrust heeft kwetsbaarheden verholpen in de producten Remote Support en Privileged Remote Access.
Interpretaties: De kwetsbaarheden betreffen meerdere aspecten van de producten Remote Support en Privileged Remote Access. Er is een pre-authenticatie kwetsbaarheid die een netwerkgebaseerde aanvaller in staat stelt om toegangcontroles te omzeilen zonder voorafgaande authenticatie, mits een specifieke authenticatieconfiguratie is ingeschakeld. Hierdoor kan een aanvaller ongeautoriseerde en mogelijk verhoogde toegang verkrijgen. Daarnaast is er een probleem met onvoldoende validatie van clientinput in het netwerkcommunicatiesubsyteem, waardoor een niet-geauthenticeerde aanvaller een denial-of-service kan veroorzaken door normale netwerkcommunicatie te verstoren. Verder kunnen geauthenticeerde gebruikers met beperkte rechten door onvoldoende inputvalidatie toegang krijgen tot niet-geautoriseerde bronnen, hoewel dit beperkt is tot accounts met specifieke permissies.
Oplossingen: BeyondTrust heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Kans: medium
Schade: high
CWE-287: Improper Authentication
CWE-400: Uncontrolled Resource Consumption
CWE-943: Improper Neutralization of Special Elements in Data Query Logic
CVE-2026-40140

BeyondTrust Remote Support and Privileged Remote Access contain a high-severity pre-authentication vulnerability that enables unauthenticated remote attackers to cause denial-of-service via insufficient client input validation in the network communication subsystem.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Product Identifier Version Remediation
vers:unknown/*
BeyondTrust / Privilege Remote Access
 vers:unknown/*
vers:unknown/*
BeyondTrust / Remote Support
 vers:unknown/*
CVE-2026-40141

A high-severity vulnerability in BeyondTrust Remote Support and Privileged Remote Access allows authenticated users with limited privileges to access unauthorized resources due to insufficient input validation, with exploitation limited to accounts having specific permissions.

9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE-943 - Improper Neutralization of Special Elements in Data Query Logic
Affected products
Product Identifier Version Remediation
vers:unknown/*
BeyondTrust / Privilege Remote Access
 vers:unknown/*
vers:unknown/*
BeyondTrust / Remote Support
 vers:unknown/*
CVE-2026-40138

A critical pre-authentication vulnerability in BeyondTrust Remote Support and Privileged Remote Access enables network attackers to bypass access controls and gain unauthorized elevated access under certain authentication configurations.

8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Product Identifier Version Remediation
vers:unknown/*
BeyondTrust / Privilege Remote Access
 vers:unknown/*
vers:unknown/*
BeyondTrust / Remote Support
 vers:unknown/*
CVE-2026-40139

A pre-authentication vulnerability in BeyondTrust Remote Support's authentication subsystem can allow unauthenticated remote attackers to bypass access controls and gain unauthorized elevated access under certain configurations.

9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Product Identifier Version Remediation
vers:unknown/*
BeyondTrust / Privilege Remote Access
 vers:unknown/*
vers:unknown/*
BeyondTrust / Remote Support
 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": "BeyondTrust heeft kwetsbaarheden verholpen in de producten Remote Support en Privileged Remote Access.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "De kwetsbaarheden betreffen meerdere aspecten van de producten Remote Support en Privileged Remote Access. Er is een pre-authenticatie kwetsbaarheid die een netwerkgebaseerde aanvaller in staat stelt om toegangcontroles te omzeilen zonder voorafgaande authenticatie, mits een specifieke authenticatieconfiguratie is ingeschakeld. Hierdoor kan een aanvaller ongeautoriseerde en mogelijk verhoogde toegang verkrijgen. Daarnaast is er een probleem met onvoldoende validatie van clientinput in het netwerkcommunicatiesubsyteem, waardoor een niet-geauthenticeerde aanvaller een denial-of-service kan veroorzaken door normale netwerkcommunicatie te verstoren. Verder kunnen geauthenticeerde gebruikers met beperkte rechten door onvoldoende inputvalidatie toegang krijgen tot niet-geautoriseerde bronnen, hoewel dit beperkt is tot accounts met specifieke permissies.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "BeyondTrust heeft updates uitgebracht om de kwetsbaarheden 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 Authentication",
        "title": "CWE-287"
      },
      {
        "category": "general",
        "text": "Uncontrolled Resource Consumption",
        "title": "CWE-400"
      },
      {
        "category": "general",
        "text": "Improper Neutralization of Special Elements in Data Query Logic",
        "title": "CWE-943"
      }
    ],
    "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.beyondtrust.com/trust-center/security-advisories/bt26-03"
      }
    ],
    "title": "Kwetsbaarheden verholpen in BeyondTrust Remote Support en Privileged Remote Access",
    "tracking": {
      "current_release_date": "2026-07-10T05:54:08.610468Z",
      "generator": {
        "date": "2025-08-04T16:30:00Z",
        "engine": {
          "name": "V.A.",
          "version": "1.3"
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      },
      "id": "NCSC-2026-0223",
      "initial_release_date": "2026-07-10T05:54:08.610468Z",
      "revision_history": [
        {
          "date": "2026-07-10T05:54:08.610468Z",
          "number": "1.0.0",
          "summary": "Initiele versie"
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      "status": "final",
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            "category": "product_name",
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  "vulnerabilities": [
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          "title": "Summary"
        },
        {
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          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-40140.json"
        }
      ],
      "scores": [
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            "version": "3.1"
          },
          "products": [
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      ],
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    {
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      },
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          "title": "Summary"
        },
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          "title": "Summary"
        },
        {
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          "text": "CVSS:4.0/AV:N/AC:H/AT:P/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",
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          "title": "Summary"
        },
        {
          "category": "general",
          "text": "CVSS:4.0/AV:N/AC:L/AT:P/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",
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      "title": "CVE-2026-40139"
    }
  ]
}



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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.


Detection rules are retrieved from Rulezet.