CVE-2020-27291
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 · uneditedDelta Electronics CNCSoft-B Versions 1.0.0.2 and prior is vulnerable to an out-of-bounds read while processing project files, 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 confidenceDelta Electronics CNCSoft-B versions 1.0.0.2 and prior contain an out-of-bounds read vulnerability when parsing project files. The vulnerability occurs due to insufficient bounds checking during file processing, which can lead to memory corruption and potentially allow arbitrary code execution by a specially crafted project file.
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<= 1.0.0.2CVSS 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.
-
Locate CNCSoft-B installationSearch for 'CNCSoft-B' or 'cncsoft' in Program Files directories, or check the Windows registry under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall for Delta Electronics software entriesAffected if The software is found installed on the system
-
Retrieve installed versionRight-click the CNCSoft-B executable (typically named CNCSoft-B.exe or similar), select Properties, and check the Details tab for the File Version or Product VersionAffected if The version displayed is 1.0.0.2 or any version lower than 1.0.0.2
-
Confirm version matches affected rangeCompare the retrieved version number against the affected range: any version <= 1.0.0.2 is vulnerableAffected if The installed version is 1.0.0.2 or prior
-
Verify project file functionality is in useCNCSoft-B is a CNC programming tool that parses project files as its core function; confirm whether users have opened or create project files (.cnp, .cnc, or vendor-specific formats) with this softwareAffected if The software is used to open or create project files (which is the default use case for this application)
The system is affected if CNCSoft-B is installed with version 1.0.0.2 or any prior version, and the software is used to process project files.
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 dataUpdate to a patched version of CNCSoft-B when available from the vendor. Until then, avoid opening untrusted or unverified project files and restrict network exposure of systems running this software.
- Consultation4.0 h
- Implementation8.0 h
- Testing12.0 h
- Review / QA6.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,192.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-27291 — 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-2020-27291 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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