CVE-2021-22640
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 · uneditedAn attacker can decrypt the Ovarro TBox login password by communication capture and brute force attacks.
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 confidenceThe Ovarro TBox uses weak password encryption in its login communications, allowing an attacker who captures network traffic to brute-force decrypt user passwords.
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 Ovarro Twinsoft versionOpen Twinsoft application and navigate to Help > About, or check the installed programs list in Windows Control PanelAffected if Version is below 12.4
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Identify TBox firmware versionAccess the TBox device web interface or console, then navigate to System > Information or use the firmware version commandAffected if Firmware version is below 1.46 for your specific model (Lt2 530, Lt2 532, Lt2 540, Ms Cpu32, Ms Cpu32 S2, Rm2, or Tg2)
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Confirm vulnerability scopeIf either Twinsoft version is below 12.4 OR TBox firmware is below 1.46, the weak password encryption vulnerability is present in your environmentAffected if Your installed version falls within the affected ranges and login communications use the weak encryption method
You are affected if you are running Ovarro Twinsoft below version 12.4 or any TBox firmware below version 1.46, as these versions use weak password encryption that can be brute-forced from captured network traffic.
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 · scoped1.4612.4
Isolate TBox devices on dedicated network segments, implement intrusion detection to identify capture attempts, and contact Ovarro for firmware updates addressing the encryption weakness.
Twinsoft 12.4; Tbox firmware 1.46
- Upgrade Twinsoft to version 12.4 or later
- Upgrade Tbox Lt2 530 Firmware to version 1.46 or later
- Upgrade Tbox Lt2 532 Firmware to version 1.46 or later
- Upgrade Tbox Lt2 540 Firmware to version 1.46 or later
- Upgrade Tbox Ms Cpu32 Firmware to version 1.46 or later
- Upgrade Tbox Ms Cpu32 S2 Firmware to version 1.46 or later
- Upgrade Tbox Rm2 Firmware to version 1.46 or later
- Upgrade Tbox Tg2 Firmware to version 1.46 or later
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation16.0 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 $10,240.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-22640 — 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-2021-22640 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