CVE-2021-27397
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 vulnerability has been identified in Tecnomatix Plant Simulation (All versions < V16.0.5). The PlantSimCore.dll library lacks proper validation of user-supplied data when parsing SPP files. This could result in a memory corruption condition. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13287)
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 memory corruption vulnerability exists in Tecnomatix Plant Simulation's PlantSimCore.dll library due to insufficient validation of user-supplied data when parsing SPP files. An attacker could exploit this to execute arbitrary code in the context of the current 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< 16.0.5CVSS 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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Verify Tecnomatix Plant Simulation installationCheck for the presence of the Plant Simulation installation directory, typically found under C:\Program Files\Siemens\Tecnomatix_Plant_Simulation or similar Siemens installation paths. Look for the PlantSimCore.dll file within the installation folder.Affected if The software is installed and the PlantSimCore.dll file is present on the system.
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Determine installed Plant Simulation versionOpen the Windows Control Panel, navigate to Programs and Features, locate Siemens Tecnomatix Plant Simulation in the list of installed software, and note the version number shown in the Version column.Affected if The installed version is listed as anything below 16.0.5 (for example, 16.0.4, 16.0.3, 15.x, or earlier).
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Check PlantSimCore.dll file versionNavigate to the Plant Simulation installation directory, right-click on PlantSimCore.dll, select Properties, and examine the File Version information on the Details tab.Affected if The PlantSimCore.dll file version is earlier than the version bundled with V16.0.5.
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Identify SPP file association or handlingSearch the installation directory for any .spp file type associations or parsers. Check if the software is configured to open or process .spp files, which is the file format that triggers the vulnerability.Affected if The software is capable of importing or parsing SPP files.
A user is affected if Tecnomatix Plant Simulation is installed with a version number lower than 16.0.5 and the software can process SPP files.
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 data16.0.5
Upgrade Tecnomatix Plant Simulation to version V16.0.5 or later to obtain the patched PlantSimCore.dll library with proper input validation.
- Consultation3.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-27397 — 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-2021-27397 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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