CVE-2021-22648
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 · uneditedOvarro TBox proprietary Modbus file access functions allow attackers to read, alter, or delete the configuration file.
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 confidenceOvarro TBox devices contain proprietary Modbus file access functions that lack proper access controls, allowing remote attackers to read, modify, or delete configuration files via Modbus protocol without authentication.
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< 12.4< 1.46< 1.46< 1.46< 1.46< 1.46< 1.46< 1.46CVSS 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:3.1/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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Identify the Ovarro productDetermine if the system is an Ovarro TBox device (check device model/label) or if Ovarro Twinsoft software is installed (check installed programs or running services)Affected if Product is Ovarro TBox or Twinsoft
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Check Twinsoft versionOpen Twinsoft application, go to Help > About, or check the installed program version in Windows Programs and FeaturesAffected if Twinsoft version is installed and is less than 12.4
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Check TBox firmware versionAccess the TBox web interface, check the System Information page, or query the device via Modbus/TCP for firmware version registersAffected if TBox firmware version is less than 1.46
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Verify Modbus service is enabledCheck if Modbus/TCP service is listening on port 502 (run 'netstat -an | findstr :502' or scan the device for port 502)Affected if Modbus/TCP is enabled and listening on network interfaces
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Assess Modbus network exposureReview firewall rules and network segmentation to determine if port 502 is accessible from untrusted networks or the internetAffected if Modbus port 502 is accessible from unauthorized network segments
You are affected if the installed Twinsoft version is below 12.4 or any TBox firmware version is below 1.46, AND Modbus/TCP port 502 is exposed to untrusted network segments.
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 data1.4612.4
Isolate TBox devices on dedicated network segments, restrict Modbus communication to authorized PLCs/SCADA systems only, and apply vendor-provided patches when available.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,448.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-22648 — 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-2021-22648 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