CVE-2018-21053

Lockscreen clipboard disclosure via physical keyboard

Published Apr 8, 2020 · Updated Aug 5, 2024

Information disclosure in Samsung mobile devices running Android 7.x through 9.0 allows physically proximate attackers to read clipboard data. The lock transition fails to hide clipboard contents from physical-keyboard interactions, leaving copied data available while the screen remains locked. Physical possession and a connected keyboard are required; the reported consequence is unauthorized clipboard disclosure without device unlock.

CVSS severity4.6
Medium
EPSS probability0.14%
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 Samsung mobile devices running Android 7.x through 9.0 allows physically proximate attackers to read clipboard data. The lock transition fails to hide clipboard contents from physical-keyboard interactions, leaving copied data available while the screen remains locked. Physical possession and a connected keyboard are required; the reported consequence is unauthorized clipboard disclosure without device unlock.

The record

CVE
CVE-2018-21053
Published
Apr 8, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-200, T1414
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 8, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
4.6NIST NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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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)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1414Clipboard Data

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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