CVE-2021-27381
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 Solid Edge SE2020 (All Versions < SE2020MP13), Solid Edge SE2021 (All Versions < SE2021MP3). Affected applications lack proper validation of user-supplied data when parsing PAR files. This could result in an out of bounds read past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-12534)
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 confidenceThis is an out-of-bounds read vulnerability in Solid Edge's PAR file parser caused by insufficient validation of user-supplied data. The lack of proper bounds checking when parsing PAR files allows reading past the end of an allocated buffer, which can be weaponized to achieve 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< se2021= se2021CVSS 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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Confirm Solid Edge installationCheck if Siemens Solid Edge is installed on the system by looking for the application in installed programs or searching for the Solid Edge executable (typically in Program Files or Program Files (x86)).Affected if Solid Edge is not installed on the system.
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Identify installed Solid Edge versionLocate the Solid Edge installation directory and check the version information of the main executable (commonly named edge.exe or similar), or right-click the executable and view Properties > Details for the File Version.Affected if The installed version is SE2021 or any version prior to SE2021 (such as SE2020, SE2019, etc.).
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Verify PAR file handling capabilityCheck if the PAR file parser component is available by examining whether PAR file associations exist in the system or by attempting to open a PAR file with the installed Solid Edge application.Affected if PAR files can be opened or parsed by the installed Solid Edge version.
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Compare version to affected rangeBased on the identified version, determine if it falls within the affected range: SE2021 or any version earlier than SE2021.Affected if The installed version is SE2021 or any version before SE2021, and the system handles PAR files from untrusted sources.
A system is affected if Solid Edge SE2021 or any earlier version is installed and the PAR file parser feature is accessible to handle files from untrusted or unknown sources.
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 dataUpdate Solid Edge SE2020 to version SE2020MP13 or later, and SE2021 to version SE2021MP3 or later. Until patches are applied, restrict handling of PAR files from untrusted or unknown sources.
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-27381 — 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-2021-27381 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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