CVE-2020-7327
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 · uneditedImproperly implemented security check in McAfee MVISION Endpoint Detection and Response Client (MVEDR) prior to 3.2.0 may allow local administrators to execute malicious code via stopping a core Windows service leaving McAfee core trust component in an inconsistent state resulting in MVEDR failing open rather than closed
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 · high confidenceIn McAfee MVISION EDR prior to version 3.2.0, the security check for protecting core components is improperly implemented. When a local administrator stops a core Windows service, the McAfee core trust component enters an inconsistent state, causing the MVEDR to fail open (disable protection) rather than fail closed (maintain protection). This allows malicious code execution.
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< 3.2.0CVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:H/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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Verify MVISION EDR installation and versionCheck the installed version of McAfee MVISION Endpoint Detection and Response via Windows Registry at HKLM\SOFTWARE\McAfee\MVISION\EDR or by running 'Get-ItemProperty -Path "HKLM:\SOFTWARE\McAfee\MVISION\EDR" -Name Version' in PowerShellAffected if The installed version is lower than 3.2.0 or the product is not found (product not installed)
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Identify core MVISION EDR Windows servicesOpen Services console (services.msc) and look for McAfee-related services with names containing 'MVISION', 'EDR', 'mvedr', or 'CoreShield' that are marked as core componentsAffected if Any of these core services are in a Stopped or Stopping state while the product is expected to be running
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Check protection status of the MVISION EDR clientOpen the MVISION EDR client console or run 'mvedrcli status' if available from command line, and verify whether real-time protection or threat prevention is reported as Enabled or ActiveAffected if Protection is reported as Disabled, Inactive, or Failed despite the product being installed
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Compare service state against expected behaviorIf a core McAfee service was recently stopped (check Event Viewer under Application logs for Service Control Manager events from McAfee), verify whether protection automatically re-enabled or remained disabledAffected if After stopping a core McAfee service, protection remains disabled rather than maintaining or resuming protection (fail-open behavior)
A user is affected if MVISION EDR version is below 3.2.0 AND core services are stopped, resulting in protection being disabled or failing to restore automatically.
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 data3.2.0
Upgrade McAfee MVISION Endpoint Detection and Response Client to version 3.2.0 or later, which implements proper security checks that ensure the product fails closed when critical services are interrupted.
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-7327 — 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-2020-7327 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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