CVE-2021-46153
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 Simcenter Femap V2020.2 (All versions), Simcenter Femap V2021.1 (All versions). Affected application contains a memory corruption vulnerability while parsing NEU files. This could allow an attacker to execute code in the context of the current process. (ZDI-CAN-14645, ZDI-CAN-15305, ZDI-CAN-15589, ZDI-CAN-15599)
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 confidenceMemory corruption vulnerability in Simcenter Femap when parsing NEU (Neutral) mesh/geometry files. The application fails to properly validate or bounds-check data within these files, leading to memory corruption that can be exploited for arbitrary code execution 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= 2020.2= 2021.1CVSS 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 Simcenter Femap installationCheck for Femap installation directory (typically C:\Program Files\Siemens\Femap or C:\Program Files (x86)\Siemens\Femap) or look for Femap executable (femap.exe) in common program directoriesAffected if Femap software is present on the system
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Identify installed Femap versionRight-click femap.exe, select Properties, then look at the Details tab for Product Version, or check the About Femap dialog within the applicationAffected if Version shown is 2020.2 or 2021.1 specifically
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Compare version against affected releasesNote that CVE-2021-46153 specifically affects versions 2020.2 and 2021.1; other version numbers (earlier or later) are not listed as affected in this CVEAffected if Installed version exactly matches 2020.2 or 2021.1
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Confirm NEU file parsing capabilityNEU (Neutral) file support is a core Femap feature for importing mesh and geometry data; check if Femap has the capability to open .neu files (typically via File > Import > Neutral or similar menu path)Affected if Femap can import or parse NEU files, which is the default functionality in affected versions
User is affected if Simcenter Femap version 2020.2 or 2021.1 is installed and the application can parse NEU (Neutral) files, as the vulnerability triggers during NEU file parsing.
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 or unverified NEU files in vulnerable Femap versions. Apply vendor patches when released. Consider input validation and sandboxing as compensating controls until a fix is available.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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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-2021-46153 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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- Version or environment caveats, and links to real fixes
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