CVE-2021-22718
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 · uneditedA CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability exists in C-Bus Toolkit (V1.15.7 and prior) that could allow a remote code execution when restoring project files.
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 confidenceA CWE-22 Path Traversal vulnerability in C-Bus Toolkit's project file restore functionality (versions V1.15.7 and prior) allows attackers to write files outside the intended restricted directory by manipulating file paths with traversal sequences (e.g., ../../../'). This can be leveraged to achieve remote code execution by placing malicious files in startup locations or system directories.
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<= 1.15.7CVSS 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
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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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Determine C-Bus Toolkit installed versionOpen C-Bus Toolkit and navigate to Help > About, or check the application's executable file properties (right-click the .exe file and view Version tab) to identify the installed version numberAffected if The version listed is 1.15.7 or lower
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Verify project restore feature accessibilityCheck if the project file restore functionality is available or has been used. This is typically found in the application menu under File > Restore Project or similar restore optionsAffected if The restore feature exists and is accessible in the installed version (all versions <= 1.15.7 contain this feature)
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Review application logs for path traversal attemptsLocate and inspect C-Bus Toolkit log files (typically stored in the application data folder or alongside project files) for entries containing sequences like ../ or ..\ that indicate path traversal attemptsAffected if Log entries contain malformed path traversal sequences or indicate failed restore operations with unusual file paths
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Check for unexpected files in system directoriesInspect startup folders (e.g., %APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup, %PROGRAMDATA%\Microsoft\Windows\Start Menu\Programs\Startup) and system directories (e.g., C:\Windows\System32) for newly created files that were not created by legitimate restore operationsAffected if Unknown or suspicious executable files are present in startup locations or system directories
A user is affected if C-Bus Toolkit version 1.15.7 or prior is installed AND the project file restore functionality is present and accessible in their environment.
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 dataUpgrade C-Bus Toolkit to a version newer than V1.15.7. If immediate patching is not possible, implement strict path validation to ensure restored files cannot escape the designated project directory, combined with file type and content restrictions.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-22718 — 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-2021-22718 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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- Version or environment caveats, and links to real fixes
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