Nextcloud is an open source content collaboration platform. Prior to versions 21.1.10, 22.0.11, and 23.0.3, a low-privileged user can force other user's microphones to be muted in calls when no High-performance Backend is installed. This issue has been patched in versions 21.1.10, 22.0.11, and 23.0.3.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
nextcloud security-advisories affected
Version Status Constraints
< 21.1.10 affected —
< 22.0.11 affected —
< 23.0.3 affected —

No data.

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x75r-65hm-cw35 cve-icon cve-icon
https://github.com/nextcloud/spreed/pull/17577 cve-icon cve-icon
https://hackerone.com/reports/3636758 cve-icon cve-icon
History

Mon, 01 Jun 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 01 Jun 2026 17:00:00 +0000

Type Values Removed Values Added
Description Nextcloud is an open source content collaboration platform. Prior to versions 21.1.10, 22.0.11, and 23.0.3, a low-privileged user can force other user's microphones to be muted in calls when no High-performance Backend is installed. This issue has been patched in versions 21.1.10, 22.0.11, and 23.0.3.
Title Nextcloud: Unauthorized force-mute from missing permission check when using internal signaling
Weaknesses CWE-284
References
Metrics cvssV3_1

{'score': 3.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-01T17:40:19.878Z

Reserved: 2026-05-11T18:41:13.156Z

Link: CVE-2026-45266

cve-icon Vulnrichment

Updated: 2026-06-01T17:40:15.423Z

cve-icon NVD

Status : Deferred

Published: 2026-06-01T17:17:09.827

Modified: 2026-06-01T18:14:29.087

Link: CVE-2026-45266

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-01T18:45:34Z

Weaknesses