November 13, 2026 Follow Egret
CVE-2021-25337 · CVE record: PUBLISHED

Samsung Mobile Devices Improper Access Control Vulnerability

Samsung Mobile Samsung Mobile Devices

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.

Exploitation evidence

Known exploited · CISA KEV listed

Added 2022-11-08. Ransomware campaign use: Unknown.

CISA required action: Apply updates per vendor instructions.

CISA due date: 2022-11-29. This is the catalog’s deadline, not an assessment of your organization’s exposure.

KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗

Reported products and versions

Samsung Mobile / Samsung Mobile Devices

Default status: Not specified

  • affected: Selected P(9.0), Q(10.0), R(11.0) to < SMR Mar-2021 Release 1 (custom)

Fixes and workarounds

No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.

Sources and related reporting

CVE Program record ↗ · Download tracked evidence as JSON

Observed change timeline

History begins when Egret first downloads each source. It is not the complete upstream CVE history.

12 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-12",
  "epss": 0.02807,
  "percentile": 0.86699
}
10 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-10",
  "epss": 0.02807,
  "percentile": 0.86617
}
09 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-09",
  "epss": 0.02807,
  "percentile": 0.866
}
08 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-08",
  "epss": 0.02807,
  "percentile": 0.86594
}
07 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-07",
  "epss": 0.02807,
  "percentile": 0.86584
}
06 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-06",
  "epss": 0.02807,
  "percentile": 0.86565
}
06 Nov 2026, 06:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-05",
  "epss": 0.02807,
  "percentile": 0.86553
}
06 Nov 2026, 00:20 Jerusalem · CVE Program record changed

Stored CNA snapshot at this observation.

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  "containers": {
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        "references": [
          {
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              "x_transferred"
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            "url": "https://security.samsungmobile.com/securityUpdate.smsb"
          },
          {
            "tags": [
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              "x_transferred"
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            "url": "https://security.samsungmobile.com"
          }
        ],
        "title": "CVE Program Container"
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      {
        "metrics": [
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              "content": {
                "id": "CVE-2021-25337",
                "options": [
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                    "Technical Impact": "partial"
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                "timestamp": "2025-02-04T21:26:40.665748Z",
                "version": "2.0.3"
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              "type": "ssvc"
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          },
          {
            "other": {
              "content": {
                "dateAdded": "2022-11-08",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-25337"
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        "providerMetadata": {
          "dateUpdated": "2025-10-21T23:25:52.563Z",
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        ],
        "timeline": [
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            "time": "2022-11-08T00:00:00.000Z",
            "value": "CVE-2021-25337 added to CISA KEV"
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        ],
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
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          "versions": [
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      "metrics": [
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      ],
      "source": {
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      },
      "x_legacyV4Record": {
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            {
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04 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-04",
  "epss": 0.02807,
  "percentile": 0.8654
}
03 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-03",
  "epss": 0.02807,
  "percentile": 0.86519
}
03 Nov 2026, 02:22 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-02",
  "epss": 0.02807,
  "percentile": 0.86502
}
03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed

Stored KEV snapshot at this observation.

{
  "cveID": "CVE-2021-25337",
  "cwes": [
    "CWE-269"
  ],
  "dateAdded": "2022-11-08",
  "dueDate": "2022-11-29",
  "forensicTriage": "No",
  "knownRansomwareCampaignUse": "Unknown",
  "notes": "https://security.samsungmobile.com/securityUpdate.smsb; https://nvd.nist.gov/vuln/detail/CVE-2021-25337",
  "product": "Mobile Devices",
  "requiredAction": "Apply updates per vendor instructions.",
  "shortDescription": "Samsung mobile devices contain an improper access control vulnerability in clipboard service which allows untrusted applications to read or write arbitrary files. This vulnerability was chained with CVE-2021-25369 and CVE-2021-25370.",
  "vendorProject": "Samsung",
  "vulnerabilityName": "Samsung Mobile Devices Improper Access Control Vulnerability"
}
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