CVE-2019-6826
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-426: Untrusted Search Path vulnerability exists in SoMachine HVAC v2.4.1 and earlier versions, which could cause arbitrary code execution on the system running SoMachine HVAC when a malicious DLL library is loaded by the product.
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 confidenceSoMachine HVAC versions 2.4.1 and earlier are vulnerable to CWE-426 (Untrusted Search Path), allowing the application to load malicious DLL libraries from attacker-controlled locations. When the application loads these DLLs, it executes arbitrary code with the privileges of the running process.
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<= 2.4.1CVSS 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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Confirm SoMachine HVAC installation and versionLocate the SoMachine HVAC installation directory and check the version information. This is typically found in the program's main executable properties, installation folder, or registry keys under the Schneider Electric product entries.Affected if The installed version is 2.4.1 or any earlier version.
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Identify application executable locationFind the main SoMachine HVAC executable (.exe) path. Common locations include C:\Program Files\Schneider Electric\SoMachine HVAC or similar paths under Program Files.Affected if The application is installed to a directory that is writable by standard users, which could allow an attacker to place malicious DLL files.
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Check directory permissions on installation folderReview NTFS permissions on the SoMachine HVAC installation directory. Use 'icacls' command or file properties Security tab to verify which users have Write or Modify permissions.Affected if Non-admin users or the Everyone group has Write or Modify access to the application directory, allowing placement of malicious DLLs.
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Inspect DLL search order behaviorMonitor or analyze how SoMachine HVAC loads DLL libraries at runtime. Use tools like Process Monitor or examine the application's configuration and manifest files for DLL dependencies.Affected if The application loads DLLs from directories that are writable by unprivileged users or searches the current working directory first.
You are affected if SoMachine HVAC version 2.4.1 or earlier is installed and the application runs from or loads DLLs from a directory writable by untrusted users.
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 SoMachine HVAC to a patched version from the vendor. If updates are unavailable, ensure the application runs from a secure, non-writable directory and implement DLL search order hardening to prevent loading from untrusted paths.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-6826 — 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-2019-6826 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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