CVE-2021-42913
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 · uneditedThe SyncThru Web Service on Samsung SCX-6x55X printers allows an attacker to gain access to a list of SMB users and cleartext passwords by reading the HTML source code. Authentication is not required.
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 confidenceThe SyncThru Web Service on Samsung SCX-6x55X printers contains an information disclosure vulnerability where SMB user credentials including cleartext passwords are embedded directly in the HTML source code of the web interface. This is a pre-authentication flaw, allowing any remote attacker to obtain valid credentials by simply requesting the page and inspecting the HTML.
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 dataall versionsCVSS 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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Confirm SyncThru Web Service is accessibleAttempt to reach the printer's web interface by accessing http://<printer-ip> or https://<printer-ip> in a browser. The service is running if a login page loads.Affected if The SyncThru Web Service login page loads successfully, indicating the service is active and exposed on the network.
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Navigate to the SMB configuration pageIn the web interface, locate the SMB or network sharing settings. This is typically found under Network Settings, SMB Settings, or a similar section where printer sharing is configured.Affected if The page loads and displays SMB configuration options, meaning SMB functionality is enabled on the device.
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View the page source HTMLRight-click on the SMB configuration page and select 'View Page Source' (or use browser developer tools, Ctrl+Shift+I, and inspect the HTML).Affected if The page source can be viewed, indicating the HTML is accessible for inspection.
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Search for embedded credentials in HTMLIn the page source, search for patterns such as 'password', 'pwd', 'credential', or look for visible or hidden form fields containing password values. Specifically look for input fields or JavaScript variables that contain SMB username and password values.Affected if Cleartext SMB credentials (usernames and/or passwords) appear anywhere in the HTML source code, indicating the vulnerability is present.
A user is affected if the SyncThru Web Service is accessible and the HTML source of any page (particularly SMB configuration pages) contains cleartext SMB credentials.
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.
From vendor dataApply vendor firmware updates when available. In the interim, restrict network access to the printer's web interface, disable SMB services if not required, and segment printers from sensitive network resources.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2021-42913 — 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-2021-42913 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