CVE-2021-25340

Physical settings alteration via initialization access-control failure

Published Mar 4, 2021 · Updated Aug 3, 2024

Improper access control in Samsung Keyboard before SMR Feb-2021 Release 1 allows physically proximate attackers to alter settings. During initialization, additional keyboard functions lack proper access-control checks and accept settings changes. Physical proximity to a device in that state is required; Samsung does not identify the affected settings or publish further implementation detail.

CVSS severity5.1
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Samsung Keyboard before SMR Feb-2021 Release 1 allows physically proximate attackers to alter settings. During initialization, additional keyboard functions lack proper access-control checks and accept settings changes. Physical proximity to a device in that state is required; Samsung does not identify the affected settings or publish further implementation detail.

The record

CVE
CVE-2021-25340
Published
Mar 4, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-284
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 4, 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?

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

5.1Samsung MobileCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:P/A:N
2.4NIST NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/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-284Improper Access Control

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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