Is CVE-2026-27467 actively exploited?

CVE-2026-27467 has no public evidence of in-the-wild exploitation as of 2026-02-26.

What is the CVSS score for CVE-2026-27467?

CVE-2026-27467 has a CVSS score of 2 (LOW severity). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N.

How do I patch CVE-2026-27467?

Patch guidance is available from bigbluebutton security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-27467.

Which products are affected by CVE-2026-27467?

1 product: bigbluebutton bigbluebutton.

CVE-2026-27467 - remediation guidance & executive summary

Description

BigBlueButton is an open-source virtual classroom. In versions 3.0.19 and below, when first joining a session with the microphone muted, the client sends audio to the server regardless of mute state. Media is discarded at the server side, so it isn't audible to any participants, but this may allow for malicious server operators to access audio data. The behavior is only incorrect between joining the meeting and the first time the user unmutes. This issue has been fixed in version 3.0.20.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
Attack Vector: network
Complexity: high
Privileges: high
User Action: required
Scope: unchanged
Confidentiality: low
Integrity: none
Availability: none
Weaknesses: CWE-200 · Information Disclosure

Metadata

Primary Vendor: BIGBLUEBUTTON
Published: 2/21/2026
Last Modified: 2/26/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

bigbluebutton : bigbluebutton

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-27467. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-27467

View on NIST NVD

CVE-2026-27467 vulnerability