CVE-2020-0047

Audio silencing via unchecked setMasterMute call

Published Mar 10, 2020 · Updated Aug 4, 2024

Missing authorization in Android 10 AudioService allows local users to silence device audio by invoking the hidden setMasterMute method. AudioService.setMasterMute accepts the Binder call without enforcing the MODIFY_AUDIO_ROUTING system permission, so an ordinary app can change the global mute state. Exploitation requires local app execution but no user interaction and interrupts device audio without disclosing data or executing code.

CVSS severity3.3
Low
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Android 10 AudioService allows local users to silence device audio by invoking the hidden setMasterMute method. AudioService.setMasterMute accepts the Binder call without enforcing the MODIFY_AUDIO_ROUTING system permission, so an ordinary app can change the global mute state. Exploitation requires local app execution but no user interaction and interrupts device audio without disclosing data or executing code.

The record

CVE
CVE-2020-0047
Published
Mar 10, 2020
Updated
Aug 4, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-862, T1642
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 10, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=Android-10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google Cloud · Androidversion=Android-10

Published CVSS scores

3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1642Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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