{ "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": "Zoom heeft kwetsbaarheden verholpen in Zoom Client voor Windows, Zoom Rooms voor Windows en andere Zoom Windows-producten zoals de Windows Desktop Client, VDI Client en Meeting SDK.", "title": "Feiten" }, { "category": "description", "text": "De kwetsbaarheden betreffen onder andere een TOCTOU race condition die door een geauthenticeerde lokale gebruiker kan worden misbruikt om privileges te escaleren. Daarnaast is er een onjuiste privilege management in Zoom Rooms voor Windows (versies eerder dan 7.1.0), waardoor geauthenticeerde lokale gebruikers hogere toegangsrechten kunnen verkrijgen dan bedoeld. Verder zijn er problemen met onjuiste inputvalidatie in de Zoom Windows Desktop Client, VDI Client en Meeting SDK, waardoor niet-geauthenticeerde aanvallers via netwerktoegang controle over gebruikersaccounts kunnen verkrijgen. Deze kwetsbaarheden ontstaan door onvoldoende validatie van inputdata en inadequate handhaving van privilege boundaries binnen de applicaties.", "title": "Interpretaties" }, { "category": "description", "text": "Zoom heeft updates uitgebracht om de kwetsbaarheden in de verschillende Windows Clients te verhelpen. Zie bijgevoegde referenties voor meer informatie.", "title": "Oplossingen" }, { "category": "general", "text": "medium", "title": "Kans" }, { "category": "general", "text": "medium", "title": "Schade" }, { "category": "general", "text": "Improper Input Validation", "title": "CWE-20" }, { "category": "general", "text": "Time-of-check Time-of-use (TOCTOU) Race Condition", "title": "CWE-367" } ], "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.zoom.com/en/trust/security-bulletin/ZSB-26011/" }, { "category": "external", "summary": "Reference", "url": "https://www.zoom.com/en/trust/security-bulletin/ZSB-26012/" }, { "category": "external", "summary": "Reference", "url": "https://www.zoom.com/en/trust/security-bulletin/ZSB-26013/" }, { "category": "external", "summary": "Reference", "url": "https://www.zoom.com/en/trust/security-bulletin/ZSB-26014/" } ], "title": "Kwetsbaarheden verholpen in Zoom", "tracking": { "current_release_date": "2026-07-17T14:37:28.933764Z", "generator": { "date": "2025-08-04T16:30:00Z", "engine": { "name": "V.A.", "version": "1.3" } }, "id": "NCSC-2026-0249", "initial_release_date": "2026-07-17T14:37:28.933764Z", "revision_history": [ { "date": "2026-07-17T14:37:28.933764Z", "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": "Zoom Clients" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/*", "product": { "name": "vers:unknown/*", "product_id": "CSAFPID-2" } } ], "category": "product_name", "name": "Zoom Rooms" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/*", "product": { "name": "vers:unknown/*", "product_id": "CSAFPID-3" } } ], "category": "product_name", "name": "Zoom Workplace VDI Plugin" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/*", "product": { "name": "vers:unknown/*", "product_id": "CSAFPID-4" } } ], "category": "product_name", "name": "Zoom Workplace for Windows" } ], "category": "vendor", "name": "Zoom Communications" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/*", "product": { "name": "vers:unknown/*", "product_id": "CSAFPID-5" } } ], "category": "product_name", "name": "Zoom Video Communications Rooms" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/*", "product": { "name": "vers:unknown/*", "product_id": "CSAFPID-6" } } ], "category": "product_name", "name": "Zoom Video Communications Workplace" } ], "category": "vendor", "name": "Zoom Video Communications" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-53410", "cwe": { "id": "CWE-367", "name": "Time-of-check Time-of-use (TOCTOU) Race Condition" }, "notes": [ { "category": "other", "text": "Time-of-check Time-of-use (TOCTOU) Race Condition", "title": "CWE-367" }, { "category": "description", "text": "A TOCTOU race condition in the installation and uninstallation processes of certain Zoom Clients for Windows allows an authenticated local user to escalate privileges.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4", "CSAFPID-5", "CSAFPID-6" ] }, "references": [ { "category": "self", "summary": "CVE-2026-53410 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-53410.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.0, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4", "CSAFPID-5", "CSAFPID-6" ] } ], "title": "CVE-2026-53410" }, { "cve": "CVE-2026-53409", "notes": [ { "category": "description", "text": "An improper privilege management vulnerability in Zoom Rooms for Windows versions prior to 7.1.0 enables authenticated local users to escalate their privileges.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4", "CSAFPID-5", "CSAFPID-6" ] }, "references": [ { "category": "self", "summary": "CVE-2026-53409 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-53409.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4", "CSAFPID-5", "CSAFPID-6" ] } ], "title": "CVE-2026-53409" }, { "cve": "CVE-2026-53411", "notes": [ { "category": "description", "text": "A TOCTOU race condition in the installation and uninstallation processes of certain Zoom Clients for Windows allows an authenticated local user to escalate privileges.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4", "CSAFPID-5", "CSAFPID-6" ] }, "references": [ { "category": "self", "summary": "CVE-2026-53411 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-53411.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4", "CSAFPID-5", "CSAFPID-6" ] } ], "title": "CVE-2026-53411" }, { "cve": "CVE-2026-53412", "notes": [ { "category": "description", "text": "Improper input validation vulnerabilities in Zoom's Windows Desktop Client, VDI Client, and Meeting SDK could allow unauthenticated attackers to compromise user accounts via network access.", "title": "Summary" } ], "product_status": { "known_affected": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4", "CSAFPID-5", "CSAFPID-6" ] }, "references": [ { "category": "self", "summary": "CVE-2026-53412 | NCSC-NL Website", "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-53412.json" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "products": [ "CSAFPID-1", "CSAFPID-2", "CSAFPID-3", "CSAFPID-4", "CSAFPID-5", "CSAFPID-6" ] } ], "title": "CVE-2026-53412" } ] }