CVE-2025-20921
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 · uneditedOut-of-bounds read in applying binary of text content in Samsung Notes prior to version 4.4.26.71 allows attackers to read out-of-bounds memory.
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 confidenceAn out-of-bounds read vulnerability exists in Samsung Notes versions prior to 4.4.26.71. The vulnerability occurs during processing of binary text content without proper bounds checking, allowing an attacker to read memory beyond allocated buffer boundaries.
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< 4.4.26.71CVSS 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
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/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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Locate Samsung Notes on the deviceOn the Android device, go to Settings > Apps > Apps, then search for or scroll to find Samsung Notes. Alternatively, open the Google Play Store app and search for Samsung Notes to view the installed app.Affected if Samsung Notes is installed on the device
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Determine the installed version numberIn the Apps list, tap on Samsung Notes, then view the Version or App version field displayed under the app name. If using adb, run: adb shell dumpsys package com.samsung.android.app.notes | grep versionNameAffected if The version displayed is visible and can be compared
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Compare against the fixed versionTake the installed version number (for example, 4.4.26.70 or 4.4.25.10) and compare it numerically to 4.4.26.71. Ensure all version components are compared: major, minor, and build numbers.Affected if The installed version is less than 4.4.26.71 (for example, 4.4.26.70, 4.4.25.10, or any earlier version)
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Verify the vulnerability trigger conditionThe vulnerability is triggered when processing binary text content within Samsung Notes. This occurs when opening or editing notes that contain specially crafted binary text data. No specific configuration setting needs to be enabled for the flaw to apply.Affected if The vulnerable version is running and the user opens or edits notes containing binary text content
The environment is affected if Samsung Notes version is lower than 4.4.26.71.
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 · scoped4.4.26.71
Update Samsung Notes to version 4.4.26.71 or later to remediate this vulnerability.
4.4.26.71 or later
- Open the Galaxy Store app on your Samsung device
- Search for Samsung Notes
- Tap Update to install the latest version (4.4.26.71 or later)
- Alternatively, open Google Play Store, search for Samsung Notes, and tap Update if an update is available
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-20921 — 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-2025-20921 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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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.
- 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
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