CVE-2021-22664
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 · uneditedCNCSoft-B Versions 1.0.0.3 and prior is vulnerable to an out-of-bounds write, which may allow an attacker to execute arbitrary code.
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 confidenceCNCSoft-B Versions 1.0.0.3 and prior contains an out-of-bounds write vulnerability that allows writing data beyond allocated memory boundaries. This memory corruption issue can be exploited to achieve arbitrary code execution on the affected system.
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<= 1.0.0.3CVSS 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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Identify if CNCSoft-B is installedCheck common installation directories for CNCSoft-B (e.g., C:\Program Files\Critical Manufacturing\CNCSoft-B, C:\Program Files (x86)\CNCSoft-B) or search for executable files named CNCSoft-B.exe, cncsoft.exe, or similar using Windows Search or PowerShell: Get-ChildItem -Path 'C:\Program Files','C:\Program Files (x86)' -Recurse -Filter '*cncsoft*' -ErrorAction SilentlyContinueAffected if CNCSoft-B executable files are found on the system
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Determine the installed version of CNCSoft-BRight-click the CNCSoft-B executable, select Properties, and view the Version tab. Alternatively, use PowerShell: Get-Item 'C:\Path\To\CNCSoft-B.exe' | Select-Object Name, VersionInfo. If installed as an application, check Windows Registry under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall for the version entry.Affected if The displayed version is 1.0.0.3 or any version prior to 1.0.0.3
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Verify the product is runningOpen Task Manager or use PowerShell: Get-Process | Where-Object {$_.ProcessName -like '*cnc*' -or $_.ProcessName -like '*CNC*'} to check if CNCSoft-B processes are currently active.Affected if CNCSoft-B processes are running on the system (the vulnerability is exploitable when the software is running)
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Confirm network exposureCheck if the affected system has open network ports that could allow remote exploitation. Use netstat -an or PowerShell: Get-NetTCPConnection -State Listen to list listening ports. Review firewall rules: netsh advfirewall firewall show rule name=allAffected if The system with CNCSoft-B is accessible on untrusted networks or has open ports exposed externally (increases exploit likelihood)
The system is affected if CNCSoft-B version 1.0.0.3 or prior is installed and running, regardless of network exposure, though remote exploitation requires network accessibility.
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 any available vendor patch for CNCSoft-B. If no patch exists, isolate the affected system from untrusted networks and restrict user privileges to limit exploit potential until remediation is possible.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-22664 — 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-2021-22664 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
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