Vulnerability-Lookup

NCSC-2026-0293

Vulnerability from csaf_ncscnl - Published: 2026-08-12 09:45 - Updated: 2026-08-12 09:45

Summary

Kwetsbaarheden verholpen in Zoom

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: Zoom heeft kwetsbaarheden verholpen in Zoom Clients en Zoom VDI Client software.

Interpretaties: De Zoom Clients bevatten meerdere kwetsbaarheden in de annotator functie. Eén betreft een ontbrekende bounds check die kan leiden tot een buffer overwrite, waardoor een externe deelnemer via netwerktoegang mogelijk willekeurige code kan uitvoeren op het apparaat van een andere deelnemer. Een andere kwetsbaarheid in dezelfde functie betreft een buffer over-read, die een denial-of-service kan veroorzaken door crashes of onderbrekingen van de dienst tijdens vergaderingen. Daarnaast is er een use-after-free kwetsbaarheid in de annotator functie die eveneens door een externe deelnemer via netwerktoegang kan worden misbruikt om willekeurige code uit te voeren op het apparaat van een andere deelnemer. Verder bevatten de Zoom VDI Client en de bijbehorende plugins een path traversal kwetsbaarheid die door een geauthenticeerde gebruiker met lokale toegang kan worden misbruikt. Deze kwetsbaarheid ontstaat door onjuiste validatie van bestandsroutes, waardoor toegang tot bestanden buiten de bedoelde directorystructuur mogelijk is, wat kan leiden tot ongeautoriseerde toegang tot gegevens.

Oplossingen: Zoom heeft updates uitgebracht om de kwetsbaarheden in Zoom Clients en Zoom VDI Client te verhelpen. Zie bijgevoegde referenties voor meer informatie.

Kans: medium

Schade: high

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-23: Relative Path Traversal

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CWE-126: Buffer Over-read

CWE-416: Use After Free

CWE-787: Out-of-bounds Write

CVE-2026-53413

A missing bounds check in Zoom Clients' annotator function allows a remote meeting participant to cause a buffer overwrite, potentially enabling remote code execution on another participant's device via network access.

8.3 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

CWE-787 - Out-of-bounds Write

Affected products

Known affected 5 products

Product	Identifier	Version	Remediation
vers:unknown/* Zoom / Rooms		vers:unknown/*
vers:unknown/* Zoom / Workplace		vers:unknown/*
vers:unknown/* Zoom / Workplace VDI Client for Windows, Workplace VDI Plugins		vers:unknown/*
vers:unknown/* Zoom Communications / Zoom Clients		vers:unknown/*
vers:unknown/* Zoom Communications / Zoom VDI		vers:unknown/*

CVE-2026-53414

A missing bounds check in Zoom Clients' annotator function can lead to a buffer over-read, allowing a meeting participant to cause a denial of service attack on another participant via network access.

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE-126 - Buffer Over-read

Affected products

Known affected 5 products

Product	Identifier	Version	Remediation
vers:unknown/* Zoom / Rooms		vers:unknown/*
vers:unknown/* Zoom / Workplace		vers:unknown/*
vers:unknown/* Zoom / Workplace VDI Client for Windows, Workplace VDI Plugins		vers:unknown/*
vers:unknown/* Zoom Communications / Zoom Clients		vers:unknown/*
vers:unknown/* Zoom Communications / Zoom VDI		vers:unknown/*

CVE-2026-53415

A use-after-free vulnerability in the annotator function of Zoom Clients allows a remote meeting participant to execute arbitrary code on another participant's device via network access.

8.3 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

CWE-416 - Use After Free

Affected products

Known affected 5 products

Product	Identifier	Version	Remediation
vers:unknown/* Zoom / Rooms		vers:unknown/*
vers:unknown/* Zoom / Workplace		vers:unknown/*
vers:unknown/* Zoom / Workplace VDI Client for Windows, Workplace VDI Plugins		vers:unknown/*
vers:unknown/* Zoom Communications / Zoom Clients		vers:unknown/*
vers:unknown/* Zoom Communications / Zoom VDI		vers:unknown/*

CVE-2026-53416

A path traversal vulnerability in Zoom VDI Client and Plugins allows an authenticated local user to potentially disclose sensitive information by exploiting improper file path handling.

7.1 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CWE-23 - Relative Path Traversal

Affected products

Known affected 5 products

Product	Identifier	Version	Remediation
vers:unknown/* Zoom / Rooms		vers:unknown/*
vers:unknown/* Zoom / Workplace		vers:unknown/*
vers:unknown/* Zoom / Workplace VDI Client for Windows, Workplace VDI Plugins		vers:unknown/*
vers:unknown/* Zoom Communications / Zoom Clients		vers:unknown/*
vers:unknown/* Zoom Communications / Zoom VDI		vers:unknown/*

References

8 references

URL	Category
https://www.zoom.com/en/trust/security-bulletin/Z…	external
https://www.zoom.com/en/trust/security-bulletin/Z…	external
https://www.zoom.com/en/trust/security-bulletin/Z…	external
https://www.zoom.com/en/trust/security-bulletin/Z…	external
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-…	self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-…	self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-…	self
https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-…	self

JSON

To clipboard

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        "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."
      },
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        "text": "Zoom heeft kwetsbaarheden verholpen in Zoom Clients en Zoom VDI Client software.",
        "title": "Feiten"
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        "text": "De Zoom Clients bevatten meerdere kwetsbaarheden in de annotator functie. E\u00e9n betreft een ontbrekende bounds check die kan leiden tot een buffer overwrite, waardoor een externe deelnemer via netwerktoegang mogelijk willekeurige code kan uitvoeren op het apparaat van een andere deelnemer. Een andere kwetsbaarheid in dezelfde functie betreft een buffer over-read, die een denial-of-service kan veroorzaken door crashes of onderbrekingen van de dienst tijdens vergaderingen. Daarnaast is er een use-after-free kwetsbaarheid in de annotator functie die eveneens door een externe deelnemer via netwerktoegang kan worden misbruikt om willekeurige code uit te voeren op het apparaat van een andere deelnemer. Verder bevatten de Zoom VDI Client en de bijbehorende plugins een path traversal kwetsbaarheid die door een geauthenticeerde gebruiker met lokale toegang kan worden misbruikt. Deze kwetsbaarheid ontstaat door onjuiste validatie van bestandsroutes, waardoor toegang tot bestanden buiten de bedoelde directorystructuur mogelijk is, wat kan leiden tot ongeautoriseerde toegang tot gegevens.",
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      "scores": [
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            "CSAFPID-3",
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      "title": "CVE-2026-53415"
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      },
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          "title": "Summary"
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      "scores": [
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}

CVE-2026-53413 (GCVE-0-2026-53413)

Vulnerability from cvelistv5 – Published: 2026-08-11 15:55 – Updated: 2026-08-12 04:00

Title

Zoom Clients - Buffer Over-write

Summary

Missing bounds check in the annotator function of Zoom Clients allows buffer over-write, which may allow a meeting participant to achieve remote code execution of another participant via network access.

Severity

8.3 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-11 00:00 UTC

CWE

CWE-787 - Out-of-bounds write

Assigner

Zoom

References

1 reference

URL	Tags
https://www.zoom.com/en/trust/security-bulletin/z…

Impacted products

1 product

Vendor	Product	Version
Zoom Communications	Zoom Clients	Affected: see references (custom)

Date Public

2026-08-11 12:00

Show details on NVD website

JSON

To clipboard

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CVE-2026-53414 (GCVE-0-2026-53414)

Vulnerability from cvelistv5 – Published: 2026-08-11 15:58 – Updated: 2026-08-11 16:55

Title

Zoom Clients - Buffer Over-read

Summary

Missing bounds check in the annotator function of Zoom Clients allows buffer over-read, which may allow a meeting participant to conduct a denial of service on another participant via network access.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-11 16:53 UTC

CWE

CWE-126 - Buffer over-read

Assigner

Zoom

References

1 reference

URL	Tags
https://www.zoom.com/en/trust/security-bulletin/z…

Impacted products

1 product

Vendor	Product	Version
Zoom Communications	Zoom Clients	Affected: see references (custom)

Date Public

2026-08-11 12:00

Show details on NVD website

JSON

To clipboard

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CVE-2026-53415 (GCVE-0-2026-53415)

Vulnerability from cvelistv5 – Published: 2026-08-11 15:59 – Updated: 2026-08-13 03:55

Title

Zoom Clients - Use After Free

Summary

Use after Free in the annotator function of Zoom Clients may allow a meeting participant to achieve remote code execution of another participant via network access.

Severity

8.3 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 00:00 UTC

CWE

CWE-416 - Use after free

Assigner

Zoom

References

1 reference

URL	Tags
https://www.zoom.com/en/trust/security-bulletin/z…

Impacted products

1 product

Vendor	Product	Version
Zoom Communications	Zoom Clients	Affected: see references (custom)

Date Public

2026-08-11 12:00

Show details on NVD website

JSON

To clipboard

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CVE-2026-53416 (GCVE-0-2026-53416)

Vulnerability from cvelistv5 – Published: 2026-08-11 16:02 – Updated: 2026-08-11 16:52

Title

Zoom VDI - Path Traversal

Summary

Path traversal in Zoom VDI Client and Plugins may allow an authenticated user to conduct information disclosure via local access.

Severity

7.1 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-11 16:50 UTC

CWE

CWE-23 - Relative path traversal

Assigner

Zoom

References

1 reference

URL	Tags
https://www.zoom.com/en/trust/security-bulletin/z…

Impacted products

1 product

Vendor	Product	Version
Zoom Communications	Zoom VDI	Affected: 0 , < 7.0.11 (custom)

Date Public

2026-08-11 12:00

Show details on NVD website

JSON

To clipboard

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

NCSC-2026-0293

CVE-2026-53413 (GCVE-0-2026-53413)

CVE-2026-53414 (GCVE-0-2026-53414)

CVE-2026-53415 (GCVE-0-2026-53415)

CVE-2026-53416 (GCVE-0-2026-53416)

Tags

Sightings

Nomenclature