CVE-2026-27467
BigBlueButton: Audio from participants to the server initially unmuted
Vexday Risk Score
8Baixo
Decisão SSVC (CISA)
Track
Sem sinal de exploração → monitorar
CVSS 2EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Ciclo de vida
21 fev 2026Publicada no NVD
Recomendação: Monitorar — sem sinal de exploração no momento.
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:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
Produtos afetados
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