CVE-2021-22756
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-125: Out-of-bounds read vulnerability exists inIGSS Definition (Def.exe) V15.0.0.21140 and prior that could result in disclosure of information or remote code execution due to lack of user-supplied data validation, 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 confidenceAn out-of-bounds read vulnerability (CWE-125) exists in IGSS Definition (Def.exe) versions 15.0.0.21140 and prior. The vulnerability stems from insufficient validation of user-supplied data when importing CGF (Common Grid Format) files, allowing an attacker to read memory beyond allocated buffers. This can lead to information disclosure or potentially remote 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<= 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 IGSS Definition installationSearch for Def.exe on the system, typically found in the IGSS installation directory (commonly C:\Program Files\Schneider Electric\IGSS\ or similar).Affected if Def.exe is present on the system
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Determine Def.exe versionRight-click Def.exe, select Properties, then view the Details tab for Product Version, or use PowerShell: (Get-Item 'C:\Program Files\Schneider Electric\IGSS\Def.exe').VersionInfo.ProductVersionAffected if Version number is 15.0.0.21140 or lower
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Identify IGSS Definition process/serviceCheck running processes or services for Def.exe or IGSS Definition, or check Windows Services for IGSS-related services.Affected if IGSS Definition service or process is running
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Verify CGF import capabilityAttempt to access the CGF file import function within IGSS Definition (typically via File > Import or similar menu), or check if the application has the capability to import Common Grid Format files.Affected if CGF file import functionality is available in the installed version
A system is affected if IGSS Definition (Def.exe) version 15.0.0.21140 or lower is installed and the CGF file import feature is accessible.
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 dataOrganizations should avoid importing CGF files from untrusted sources into IGSS Definition. Apply any vendor patches when available. If immediate patching is not possible, implement network segmentation and restrict file import privileges to prevent exploitation.
- Consultation4.0 h
- Implementation8.0 h
- Testing12.0 h
- Review / QA6.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-22756 — 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-2021-22756 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
- No spam, self-promotion, credentials, or personal data