CVE-2018-8919
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 SYNO.Core.Desktop.SessionData in Synology DiskStation Manager (DSM) before 6.1.6-15266 allows remote attackers to steal credentials 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 · moderate confidenceAn information exposure vulnerability in SYNO.Core.Desktop.SessionData component of Synology DiskStation Manager allows remote attackers to steal user credentials. The flaw exists in versions prior to 6.1.6-15266 and is exploitable via unspecified vectors, enabling complete authentication bypass.
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< 6.1.6-15266CVSS 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
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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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Locate DSM version numberLog into Synology DiskStation Manager web interface and navigate to Control Panel > System > General > About. Alternatively, run `cat /etc/VERSION` via SSH on the NAS device.Affected if Version shown is lower than 6.1.6-15266
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Compare installed version to patch thresholdCompare the version number obtained from the previous step against 6.1.6-15266. Note that version strings follow the format major.minor.build-revision (for example, 6.1.5-15254).Affected if Installed version is any release prior to 6.1.6-15266 (e.g., 6.1.5, 6.1.4, 6.2.x below patch level)
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Confirm DSM is exposed to networkVerify that the DSM web interface (typically ports 5000/5001 or 80/443) is accessible from network segments beyond the trusted local network. Check router/firewall rules and DSM firewall settings in Control Panel > Security > Firewall.Affected if DSM management ports are reachable from untrusted networks or the internet
You are affected if your DSM version is below 6.1.6-15266 AND the management interface is network-accessible to attackers.
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 · scoped6.1.6-15266
Upgrade Synology DSM to version 6.1.6-15266 or later. If immediate patching is not possible, restrict network access to the DSM management interface and implement additional authentication controls such as two-factor authentication.
DSM 6.1.6-15266 or later
- 1. Back up all critical data on the Synology NAS before proceeding with any system update
- 2. Log into DiskStation Manager (DSM) as an administrator
- 3. Navigate to Control Panel > Update & Restore > DSM Update
- 4. Click 'Download Now' or 'Update Now' to obtain DSM version 6.1.6-15266 or later
- 5. Follow the on-screen prompts to complete the firmware update
- 6. After the update completes, verify the DSM version is 6.1.6-15266 or higher by checking Control Panel > About
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation2.0 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-2018-8919 — 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-2018-8919 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
- No spam, self-promotion, credentials, or personal data