CVE-2021-22751
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-787: Out-of-bounds write vulnerability exists inIGSS Definition (Def.exe) V15.0.0.21140 and prior that could result in disclosure of information or execution of arbitrary code due to lack of input validation, when a malicious CGF (Configuration Group File) 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 · moderate confidenceAn out-of-bounds write vulnerability (CWE-787) exists in Schneider Electric IGSS Definition (Def.exe) versions 15.0.0.21140 and prior. The vulnerability stems from insufficient input validation when importing CGF (Configuration Group File) files, allowing a maliciously crafted file to write beyond buffer boundaries. Successful exploitation can lead to information disclosure or arbitrary code execution 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<= 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 executableSearch for Def.exe on the system using file search or check common installation directories for Schneider Electric softwareAffected if Def.exe is found on the system
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Determine IGSS Definition versionRight-click Def.exe, select Properties, and check the File Version field under the Details tab. Alternatively, right-click the executable in Windows Explorer and look for version informationAffected if The version is 15.0.0.21140 or lower
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Verify CGF import capability existsLaunch IGSS Definition and navigate the menu options to locate any CGF import, load, or configuration file import functionalityAffected if The application has CGF file import functionality present
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Check for existing CGF filesSearch the system for .cgf files, particularly in IGSS project directories or recent download locationsAffected if CGF files from untrusted or unknown sources exist on the system
The system is affected if IGSS Definition (Def.exe) version 15.0.0.21140 or lower is installed and CGF file import functionality 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 dataAvoid importing CGF files from untrusted or unknown sources into IGSS Definition. Apply the vendor-supplied patch when available and ensure proper antivirus scanning of any files before import. Network segmentation and least-privilege principles can limit exposure if the application is compromised.
- Consultation2.0 h
- Implementation1.0 h
- Testing4.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-22751 — 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-2021-22751 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