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VulnerabilityAwaiting classification

CVE-2026-21053

MEDIUM · 5.1 CVSS v4.0 Published 2026-07-10
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
56/100
Remediation priority · Elevated
No privileges Zero-click 6 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Improper input validation in Samsung Email prior to version 6.2.13.1 allows local attackers to create arbitrary files within the application sandbox.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Improper input validation in Samsung Email prior to version 6.2.13.1 allows local attackers to create arbitrary files within the application sandbox. This file write primitive could be chained with other vulnerabilities for data exfiltration or privilege escalation within the app's context.

MitigationUpdate Samsung Email to version 6.2.13.1 or later to obtain the patched binary with proper input validation.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
None
Authentication
X
User interaction
None
Scope
X

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify if Samsung Email app is installed
    On the Samsung device, navigate to Settings > Apps > Samsung Email, or use ADB command: adb shell pm list packages | grep samsung.email
    Affected if Samsung Email package (com.samsung.android.email.service or similar) is present on the device
  2. Retrieve the installed version number
    In Settings > Apps > Samsung Email, view the App info screen to see the version name and version code. Alternatively, use ADB: adb shell dumpsys package com.samsung.android.email.service | grep versionName
    Affected if Unable to determine version - app may be hidden or sideloaded
  3. Compare version against the fixed release
    Check if the installed version is 6.2.13.1 or higher. Note that version strings may appear as '6.2.13.1' or '6.2.13.1 (12345678)'
    Affected if Version is lower than 6.2.13.1 (for example, 6.2.12.0, 6.2.11.x, or any earlier version)
  4. Verify the vulnerability context applies
    Confirm the device allows local app installation or is rooted - the advisory notes local attackers as the threat vector, meaning the flaw enables an installed malicious app or adb-accessible attacker to write files within the Samsung Email sandbox
    Affected if Device has third-party app installation enabled or root access, increasing the likelihood of exploitation

A user is affected if Samsung Email is installed with any version prior to 6.2.13.1, as the improper input validation permits arbitrary file creation within the application sandbox.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update Samsung Email to version 6.2.13.1 or later to obtain the patched binary with proper input validation.

Recommended fix Moderate confidence

Samsung Email version 6.2.13.1 or later

  1. Open the Samsung Email app on your Samsung device
  2. Navigate to the app settings or menu option
  3. Access your device's Galaxy Store or Google Play Store
  4. Search for Samsung Email app
  5. Update to version 6.2.13.1 or latest available version

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,060
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.

Scan for this in your stack

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dbcve dependency scanner

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-21053 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data