CVE-2021-22759
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-416: Use after free vulnerability exists inIGSS Definition (Def.exe) V15.0.0.21140 and prior that could result in loss of data or remote code execution due to use of unchecked input data, when a malicious CGF file is imported to IGSS Definition.
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-416 Use-After-Free vulnerability exists in IGSS Definition (Def.exe) versions V15.0.0.21140 and prior. The vulnerability is triggered when a user imports a malicious CGF (Common Graphics Format) file into the application. The application uses unchecked input data during file parsing, leading to use of freed memory and potential remote code execution or data loss.
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<= 15.0.0.21140CVSS 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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Locate the IGSS Definition executableSearch the system for Def.exe, typically found in the IGSS installation directory (commonly C:\Program Files\Schneider Electric\IGSS or similar). Use 'where /r C:\ Def.exe' or check the program's installation path.Affected if Def.exe exists on the system, indicating IGSS Definition is installed.
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Determine the installed IGSS Definition versionRight-click Def.exe, select Properties, then look at the Version tab for the file version. Alternatively, right-click the IGSS Definition application in the Windows Start menu and select Properties to view the version.Affected if The reported version is 15.0.0.21140 or any earlier version number.
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Verify the exact file version against affected rangeCompare the identified version number to the affected range. The application version shown in the file properties may display as a build number or full version string.Affected if The version is 15.0.0.21140 or lower (for example, 15.0.0.21000, 14.x.x.x, etc.).
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Confirm CGF import functionality is presentLaunch IGSS Definition (Def.exe) and check if the application includes options for importing CGF (Common Graphics Format) files, typically found under File or Import menus.Affected if The CGF import feature exists and is accessible in the application interface.
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Review recent CGF file import activityCheck application logs or recent file history for any CGF file imports. Look in the IGSS working directories or recent documents for .cgf files that may have been opened.Affected if CGF files have been imported recently, showing the attack surface is active.
The system is affected if IGSS Definition (Def.exe) is installed with a version of 15.0.0.21140 or prior and the CGF import feature is available or has been used.
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 IGSS Definition to a patched version if available, or implement strict input validation and sandboxing for CGF file imports to prevent exploitation.
- Consultation4.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-22759 — 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-2021-22759 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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