CVE-2021-25405

Local file access via ScreenOffActivity

Published Jun 11, 2021 · Updated Aug 3, 2024

Improper access control in ScreenOffActivity in Samsung Notes before 4.2.04.27 allows untrusted applications to read local files. ScreenOffActivity fails to enforce authorization when handling requests from another application, exposing files stored locally. A local application must run on the device; the impact is confined to confidentiality of accessible files, with no integrity or availability effect reported.

CVSS severity5.5
Medium
EPSS probability0.23%
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 ScreenOffActivity in Samsung Notes before 4.2.04.27 allows untrusted applications to read local files. ScreenOffActivity fails to enforce authorization when handling requests from another application, exposing files stored locally. A local application must run on the device; the impact is confined to confidentiality of accessible files, with no integrity or availability effect reported.

The record

CVE
CVE-2021-25405
Published
Jun 11, 2021
Updated
Aug 3, 2024
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Notes
Classifications
CWE-284
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 11, 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=unspecified <4.2.04.27

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Samsung Electronics Co., Ltd. · Samsung Notesversion=unspecified <4.2.04.27

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.1NVDAV:L/AC:L/Au:N/C:P/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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