CVE-2023-52946
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 · uneditedBuffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in vss service component in Synology Drive Client before 3.5.0-16084 allows remote attackers to overwrite trivial buffers and crash the client via unspecified vectors.
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 confidenceA classic buffer overflow vulnerability exists in the VSS (Volume Shadow Copy Service) component of Synology Drive Client versions prior to 3.5.0-16084. The vulnerability stems from insufficient bounds checking during buffer copy operations, allowing remote attackers to overflow a fixed-size buffer via unspecified vectors, resulting in client crash (denial of service).
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< 3.5.0-16084CVSS 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
- Low
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
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 Synology Drive Client is installedOn Windows, check Program Files or Program Files (x86) for 'Synology' folder, or open Programs and Features to list installed applications. On macOS, check /Applications folder.Affected if Synology Drive Client is found on the system
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Retrieve the installed version numberOn Windows: Right-click the Synology Drive Client application in Programs and Features, select Properties, and check the Version field. Alternatively, open the client and look in Help > About. On macOS: Right-click the app in Applications, select Get Info, and check the Version field.Affected if Version displayed is lower than 3.5.0-16084
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Confirm VSS (Volume Shadow Copy Service) component is in useCheck if Volume Shadow Copy backups are enabled in Synology Drive Client settings, or review Windows Services to confirm the VSS service related to Synology is active. Also check if any scheduled backup tasks using VSS exist.Affected if VSS-based backup features are enabled or scheduled
If Synology Drive Client is installed with a version below 3.5.0-16084 and the VSS component is in use, the environment is affected by this vulnerability.
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 · scoped3.5.0-16084
Upgrade Synology Drive Client to version 3.5.0-16084 or later to patch the buffer overflow vulnerability in the VSS service component.
3.5.0-16084 or later
- 1. Open Synology Drive Client on the affected system
- 2. Check the current version by navigating to the client settings or About section
- 3. Download the latest version of Synology Drive Client from the official Synology website (www.synology.com) or from your Synology NAS server
- 4. Install version 3.5.0-16084 or later
- 5. Restart the client if necessary to ensure the update is fully applied
- 6. Verify the installed version shows 3.5.0-16084 or higher
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 h
- Testing1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-52946 — 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-2023-52946 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
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