CVE-2021-31342

Code execution via unchecked DFT buffer write

Published Jun 8, 2021 · Updated Aug 3, 2024

Out-of-bounds write in Siemens Solid Edge SE2020 before 2020MP14 and SE2021 before SE2021MP5 allows attackers to execute code via a DFT file. The ugeom2d.dll DFT parser fails to validate user-supplied data before writing past the end of an allocated structure. Exploitation requires a user to open a malicious DFT file and runs code in the current process context.

CVSS severity8.8
High
EPSS probability2.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Siemens Solid Edge SE2020 before 2020MP14 and SE2021 before SE2021MP5 allows attackers to execute code via a DFT file. The ugeom2d.dll DFT parser fails to validate user-supplied data before writing past the end of an allocated structure. Exploitation requires a user to open a malicious DFT file and runs code in the current process context.

The record

CVE
CVE-2021-31342
Published
Jun 8, 2021
Updated
Aug 3, 2024
Vendor
Siemens
Product
Solid Edge
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Solid Edge SE2020 – All versions before 2020MP14
  2. Affected versionversion=Solid Edge SE2021 – All versions before SE2021MP5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Siemens · Solid Edgeversion=Solid Edge SE2020 – All versions before 2020MP14; version=Solid Edge SE2021 – All versions before SE2021MP5

Published CVSS scores

7.8Zero Day InitiativeCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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