CVE-2025-13593
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 · uneditedOrigin validation error vulnerability in Synology ActiveProtect Agent before 1.1.0-0439 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation.
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 confidenceOrigin validation error in Synology ActiveProtect Agent allows local users to write arbitrary files with restricted content and cause denial-of-service during the installation process. The vulnerability exists due to insufficient validation of file origins during the installer, potentially allowing privilege escalation or service disruption.
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< 1.1.0-0439CVSS 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
- Low
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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 ActiveProtect Agent is installedLocate the Synology ActiveProtect Agent installation on the system. Common locations include Program Files on Windows or /opt on Linux. Look for executable files or service entries named 'ActiveProtect' or 'APAgent'.Affected if The software is not found on the system, indicating it is not installed and therefore not affected by this vulnerability.
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Determine installed versionCheck the version of ActiveProtect Agent. On Windows, right-click the executable and select Properties, then view the Details tab for version information. On Linux, run 'apagent --version' or check the application directory for version files. Alternatively, check the Windows Registry or Linux package management system for installed version information.Affected if Unable to determine the version, making it unclear whether the installation is affected.
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Compare version against affected rangeCompare the installed version number to the affected range: versions prior to 1.1.0-0439 are vulnerable. If the version is 1.1.0-0439 or later, the installation includes the fix.Affected if Installed version is lower than 1.1.0-0439, for example 1.1.0-0400 or 1.0.x versions, indicating the system is affected by this vulnerability.
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Check for recent installation activityReview system logs, installation logs, or the installation directory for recent installer activity. Look for temporary installer files or log entries from the setup process.Affected if Recent installation or setup activity is present on a version lower than 1.1.0-0439, indicating potential exposure to the vulnerability during the installation process.
The system is affected if Synology ActiveProtect Agent is installed with a version lower than 1.1.0-0439.
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 · scoped1.1.0-0439
Upgrade Synology ActiveProtect Agent to version 1.1.0-0439 or later to remediate this vulnerability.
1.1.0-0439 or later
- Upgrade Synology ActiveProtect Agent to version 1.1.0-0439 or later via Synology's package management interface or DSM package center
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 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-2025-13593 — 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-2025-13593 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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