CVE-2026-20999
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 · uneditedAuthentication bypass by replay in Smart Switch prior to version 3.7.69.15 allows remote attackers to trigger privileged functions.
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 a replay attack vulnerability in Smart Switch that allows remote attackers to bypass authentication mechanisms and trigger privileged functions. The flaw exists in versions prior to 3.7.69.15 and involves the ability to intercept and replay valid authentication tokens or session data to gain unauthorized access to privileged operations.
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< 3.7.69.15CVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 Smart Switch is installedCheck for Samsung Smart Switch application on the system. On Windows, look in Program Files or Program Files (x86) for a 'Samsung Smart Switch' folder. On Mac, check /Applications for 'Smart Switch.app'.Affected if Samsung Smart Switch application is found on the system
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Identify installed versionRight-click the Smart Switch desktop shortcut and select Properties, then look at the Details tab for version information. Alternatively, open Smart Switch, click the menu (three lines) or gear icon, and look for 'About' or 'Version' in the settings.Affected if Unable to determine version number from application properties or about section
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Compare against vulnerable rangeTake the discovered version number (for example, 3.7.69.14 or any version below 3.7.69.15) and compare it to the affected range: any version prior to 3.7.69.15 is vulnerable.Affected if Installed version is less than 3.7.69.15 (for example, 3.7.69.14, 3.7.60.00, etc.)
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Confirm active usageDetermine if Smart Switch is being actively used for device data transfers, backups, or firmware updates between Samsung devices or from other manufacturers.Affected if Smart Switch is actively used for data transfers, backups, or firmware updates
You are affected if Samsung Smart Switch is installed and the installed version is below 3.7.69.15, and the application is used for transfers or backups.
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.
dbcve · scoped3.7.69.15
Upgrade Smart Switch to version 3.7.69.15 or later to apply the fix. If immediate upgrade is not possible, consider implementing additional session validation mechanisms such as timestamps, nonces, or one-time tokens to mitigate replay attacks.
Smart Switch version 3.7.69.15
- Open Smart Switch on your device or computer
- Navigate to the Settings or About section to check the current version number
- If the installed version is below 3.7.69.15, download the latest version of Smart Switch from the official Samsung website or your device's app store
- Install the updated Smart Switch version 3.7.69.15 or later
- Verify the version has been successfully updated to 3.7.69.15 or higher
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-20999 — 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-2026-20999 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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- 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