CVE-2026-27467

lowpriority · track · 10EPSS 0.002 · 11 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.21% (11th) EPSS

CVSS 2.4 · low

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-28

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

Technical severity, 0–10. One row per scoring source.

2.4

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.12.4lowCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 0.9 · impact 1.4

v3.12lowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:Nsecondary · ENISA EU

v3.12lowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:Nsecondary · security-advisories@github.comexploitability 0.5 · impact 1.4

v3.12.2lowCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-200US

affected products (4)

Products and version ranges known to be affected.

Open Source BigBlueButton <3.0.20all versionscert_bundDE
Open Source BigBlueButton< 3.0.20cert_bundDE
bigbluebutton bigbluebutton≤ < 3.0.20enisa_euvdEU
bigbluebutton bigbluebutton< 3.0.20nvdUScpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0463BigBlueButton: Mehrere SchwachstellenDeutsch2026-02-19csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in BigBlueButton ausnutzen, um einen Denial of Service Angriff durchzuführen, und um Informationen offenzulegen.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2026-02-21modified 2026-06-17

references (7)

External citations — patches, advisories, analysis.

scry

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