CVE-2021-22753
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 loss of data or remote code execution due to missing length checks, when a malicious WSP file is being parsed by 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 due to missing length checks when parsing WSP project files. An attacker can craft a malicious WSP file that causes the parser to read beyond buffer boundaries, potentially exposing sensitive memory contents and achieving 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 (Def.exe) installationCheck common installation paths: C:\Program Files\Schneider Electric\IGSS\Def.exe or C:\Program Files (x86)\Schneider Electric\IGSS\Def.exe. Also search for Def.exe using Windows Search or: dir /s C:\Def.exeAffected if Def.exe is found on the system
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Determine Def.exe version numberRight-click Def.exe, select Properties, go to the Details tab and note the Product Version or File Version field. Alternatively, run: powershell (Get-Item 'C:\Program Files\Schneider Electric\IGSS\Def.exe').VersionInfo
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Confirm IGSS is actively used for WSP project filesVerify that the IGSS Definition module (Def.exe) is used to open, edit, or parse WSP project files. Check for .wsp files on the system or in project directories.Affected if Users open WSP files with Def.exe (this is the default and intended function of the software)
If Def.exe version is 15.0.0.21140 or lower and the software is used to open WSP project files, the environment is affected by this vulnerability.
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 opening untrusted WSP files from unknown or untrusted sources. Apply vendor patches when available. Consider network isolation and application sandboxing as compensating controls until the vulnerability is patched.
- Consultation4.0 h
- Implementation8.0 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-2021-22753 — 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-2021-22753 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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