CVE-2021-25406
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 · uneditedInformation exposure vulnerability in Gear S Plugin prior to version 2.2.05.20122441 allows unstrusted applications to access connected BT device information.
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 · moderate confidenceThis is an improper access control vulnerability in the Samsung Gear S Plugin (the companion app for Samsung wearables) where untrusted applications can access connected Bluetooth device information. The issue stems from insufficient authorization checks that allow any installed application to query and retrieve metadata about paired Bluetooth devices, potentially exposing device names, addresses, and connection characteristics.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 2.2.05.20122441CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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 checksWork through these to decide whether this CVE applies to you.
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Verify Samsung Gear S Plugin is installedNavigate to the device's application settings or app drawer and locate the 'Gear S Plugin' or 'Samsung Gear S Plugin' application. On Android, this can also be checked via ADB with: adb shell pm list packages | grep -i gearAffected if The application is not found in the installed applications list, the vulnerability does not apply.
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Determine the installed version of Gear S PluginIn Android Settings > Apps > Gear S Plugin, view the 'Version' or 'App version' information displayed under the app name. Alternatively, use ADB: adb shell dumpsys package com.samsung.android.app.gearb | grep versionNameAffected if The version displayed cannot be determined from the application.
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Compare installed version against vulnerable rangeCompare the identified version number to the vulnerable range: any version lower than 2.2.05.20122441 is affected. For example, versions like 2.2.04.x, 2.2.03.x, or earlier are vulnerable.Affected if The installed version is less than 2.2.05.20122441 (e.g., 2.2.04.20112345 or older).
A user is affected if the Samsung Gear S Plugin is installed and its version is lower than 2.2.05.20122441.
Generated from the published advisory. Verify against your own configuration.
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.
From vendor data2.2.05.20122441
Update the Gear S Plugin to version 2.2.05.20122441 or later, which contains the fix for this improper access control issue.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-25406 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-25406 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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