CVE-2021-0588

SMS disclosure via unprotected MAP Client broadcasts

Published Jul 14, 2021 · Updated Aug 3, 2024

Information disclosure in Android 8.1 and 9 allows local users to read SMS data through unprotected Bluetooth MAP Client broadcasts. processInboundMessage in MceStateMachine.java broadcasts incoming MAP messages without requiring the RECEIVE_SMS permission. A locally installed application needs no additional execution privileges or user interaction to receive the exposed message data.

CVSS severity5.5
Medium
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

Information disclosure in Android 8.1 and 9 allows local users to read SMS data through unprotected Bluetooth MAP Client broadcasts. processInboundMessage in MceStateMachine.java broadcasts incoming MAP messages without requiring the RECEIVE_SMS permission. A locally installed application needs no additional execution privileges or user interaction to receive the exposed message data.

The record

CVE
CVE-2021-0588
Published
Jul 14, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-668, T1636.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Android-8.1 Android-9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google Cloud · Androidversion=Android-8.1 Android-9

Published CVSS scores

4.9NIST NVDAV:L/AC:L/Au:N/C:C/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-668Exposure of Resource to Wrong Sphere
T1636.004Protected User Data: SMS Messages

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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