CVE-2022-41666
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-347: Improper Verification of Cryptographic Signature vulnerability exists that allows adversaries with local user privileges to load a malicious DLL which could lead to execution of malicious code. Affected Products: EcoStruxure Operator Terminal Expert(V3.3 Hotfix 1 or prior), Pro-face BLUE(V3.3 Hotfix1 or prior).
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 confidenceA CWE-347 Improper Verification of Cryptographic Signature vulnerability exists in EcoStruxure Operator Terminal Expert and Pro-face BLUE (versions V3.3 Hotfix 1 and prior). The application fails to properly verify cryptographic signatures when loading DLL files, allowing a local attacker with standard user privileges to place a malicious DLL in a location where the application will load it, resulting in arbitrary 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< 3.3= 3.3< 3.3= 3.3CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/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.
-
Check installed application versionLocate the application in Programs and Features (Windows) or check the executable file properties for the version number. Compare against affected versions: 3.3 or prior.Affected if Installed version is 3.3 or lower (including all versions below 3.3)
-
Verify application directory permissionsCheck file system ACLs on the application installation folders. Verify that standard user accounts cannot add, modify, or replace files in these directories.Affected if Standard users have write permissions to application directories where DLLs are loaded from
-
Inspect for unauthorized DLL filesReview all DLL files in the application installation directory for unknown or suspicious files. Compare against legitimate application DLLs if a clean reference is available.Affected if Unexpected DLL files exist in application directories that were not installed by the vendor
-
Observe DLL loading behaviorUse process monitoring tools to observe which directories the application loads DLLs from during startup and operation. Check if it loads DLLs from the current working directory or user-writable locations.Affected if Application loads DLLs from directories writable by standard users
A system is affected if the installed version is 3.3 or prior AND the application directory permissions allow standard users to place files that the application will load as DLLs.
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.
dbcve · scoped3.3
Apply the vendor patch/upgrade to a version beyond V3.3 Hotfix 1. Until patches are applied, restrict filesystem access to prevent unauthorized DLL placement and monitor for suspicious DLL files in application directories.
V3.3 Hotfix 2 or later / V3.4 or later
- 1. Identify the current installed version of EcoStruxure Operator Terminal Expert or Pro-face BLUE
- 2. If the version is 3.3 Hotfix 1 or prior, plan for an upgrade
- 3. Contact Schneider Electric support or visit the official download portal to obtain the fixed version
- 4. Before upgrading, backup all project files and configurations
- 5. Install the updated version (V3.3 Hotfix 2 or later, or a newer stable release)
- 6. Verify the application starts correctly after upgrade
- 7. Test that DLL loading behavior now properly validates cryptographic signatures
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation2.0 h
- Testing3.0 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 $2,832.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-41666 — 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-2022-41666 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