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Vulnerabilities/CVE-2021-25337Public Intelligence Dossier
Source: samsung · Limited verification•Last verified: •Collection Degraded
CVE-2021-25337ListedHIGH (raw)CVSS 7.1CWE-269

Improper access control in clipboard service in Samsung mobile devices prior to SMR Mar-2021 Release 1 allows untrusted applications to read or write certain local files.

Published: 05 Mar 2021•Last updated: 17 Jun 2026, 09:11 AM IST•Source identifier: mobile.security@samsung.com
Dossier completeness: source-provided sections 3 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Listed
Added08 Nov 2022
Due29 Nov 2022
RansomwareUnknown
CVSS score
7.1HIGH (raw)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Metric sourcenvd@nist.gov
EPSS probability
2.8%0.028
Percentile87th
Weakness type
CWE-269
NVD-CWE-Other
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

Improper access control in clipboard service in Samsung mobile devices prior to SMR Mar-2021 Release 1 allows untrusted applications to read or write certain local files.

SOC priority

Immediate Attention

Actively exploited (source statement)

Yes

Publicly disclosed

Unknown

Risk basis: CISA KEV exploitation signal; HIGH severity; Source-confirmed exploitation or CISA KEV/ransomware metadata

Affected Products & Remediation

1 source-backed product
Affected products and versions (source)
  • samsung android · 9.0; 10.0; 11.0 · NVD CPE · Source
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

  • CISA KEV: Apply updates per vendor instructions.

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Listed
Exploited (source statement)
Yes
Publicly disclosed (source)
Unknown

CISA required action: Apply updates per vendor instructions.

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched privilege-escalation (CWE-269, CVSS AV:L)

Exposure

  1. Identify affected hosts and verify the local product version.Telemetry: DeviceTvmSoftwareVulnerabilities · Local attack-vector scoring does not imply every host is vulnerable. · Rule privilege-escalation

Exploitation evidence

  1. Review unusual privilege changes and process lineage on affected hosts.Telemetry: DeviceProcessEvents · Privilege transitions provide a focused investigation starting point. · Rule privilege-escalation

Response

  1. Confirm the source-stated update on affected hosts.Telemetry: DeviceTvmSoftwareVulnerabilities · Host inventory can verify remediation. · Rule privilege-escalation

CISA KEV Record

Catalog entry
08 Nov 2022
Required action due
29 Nov 2022
Known ransomware use
Unknown

Apply updates per vendor instructions.

Change History & Source Data

— No recorded material change

CNA / source
mobile.security@samsung.com
Record status · verification
UPDATED · CISA KEV confirmed
CPE
cpe:2.3:o:samsung:android:9.0:smr-apr-2019-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:9.0:smr-apr-2020-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:9.0:smr-aug-2019-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:9.0:smr-aug-2020-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:9.0:smr-dec-2018-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:9.0:smr-dec-2019-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:9.0:smr-dec-2020-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:9.0:smr-feb-2019-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:9.0:smr-feb-2020-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:9.0:smr-feb-2021-r1:*:*:*:*:*:*

Evidence & Provenance

4 public sources
CISA KEV CatalogAdded 2022-11-08security.samsungmobile.comSource recordnvd.nist.govSource recordsecurity.samsungmobile.comSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2021-25337
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2021-25337
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2021-25337"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

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Correlated briefings

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.