CVE-2021-27494

mediumpriority · track · 32EPSS 0.022 · 82 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.20% (82nd) EPSS

CVSS 6.8 · medium

Is it mine?

19 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

Datakit Software libraries CatiaV5_3dRead, CatiaV6_3dRead, Step3dRead, Ug3dReadPsr, Jt3dReadPsr modules in KeyShot Versions v10.1 and prior lack proper validation of user-supplied data when parsing STP files. This could result in a stack-based buffer overflow. An attacker could leverage this vulnerability to execute code in the context of the current process.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedSolid Edge SE2020siemens_psirt
Update KeyShot V8 (as bundled with SE2020) to V10.2 or later version
https://www.keyshot.com/resources/downloads/
FixedSolid Edge SE2021siemens_psirt
Update KeyShot V9 (as bundled with SE2021) to V10.2 or later version
https://www.keyshot.com/resources/downloads/
MitigationSolid Edge SE2020siemens_psirt
Avoid to open untrusted files from unknown sources
MitigationSolid Edge SE2021siemens_psirt
Avoid to open untrusted files from unknown sources
MitigationCatiaV5_3dReadcisa_csaf_ot
Datakit has released CrossCAD/Ware library Version 2021.2 and recommends software vendors upgrade to this version or later. Versions 2021.1 or earlier are still affected by the vulnerabilities.
MitigationCatiaV6_3dReadcisa_csaf_ot
Datakit has released CrossCAD/Ware library Version 2021.2 and recommends software vendors upgrade to this version or later. Versions 2021.1 or earlier are still affected by the vulnerabilities.
MitigationJt3dReadPsrcisa_csaf_ot
Datakit has released CrossCAD/Ware library Version 2021.2 and recommends software vendors upgrade to this version or later. Versions 2021.1 or earlier are still affected by the vulnerabilities.
MitigationKeyShotcisa_csaf_ot
Datakit has released CrossCAD/Ware library Version 2021.2 and recommends software vendors upgrade to this version or later. Versions 2021.1 or earlier are still affected by the vulnerabilities.
MitigationStep3dReadcisa_csaf_ot
Datakit has released CrossCAD/Ware library Version 2021.2 and recommends software vendors upgrade to this version or later. Versions 2021.1 or earlier are still affected by the vulnerabilities.
MitigationUg3dReadPsrcisa_csaf_ot
Datakit has released CrossCAD/Ware library Version 2021.2 and recommends software vendors upgrade to this version or later. Versions 2021.1 or earlier are still affected by the vulnerabilities.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–7.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.07.8highCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · CISA US

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:U/RC:Csecondary · Siemens ProductCERT DE

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-121USCWE-121USCWE-121US

affected products (19)

Products and version ranges known to be affected.

CatiaV5_3dRead: Versions 2021.1 and earlierall versionscisa_csaf_otUS
CatiaV6_3dRead: Versions 2021.1 and earlierall versionscisa_csaf_otUS
Jt3dReadPsr: Versions 2021.1 and earlierall versionscisa_csaf_otUS
KeyShot: Versions v10.1 and priorall versionscisa_csaf_otUS
Step3dRead: Versions 2021.1 and earlierall versionscisa_csaf_otUS
Ug3dReadPsr: Versions 2021.1 and earlierall versionscisa_csaf_otUS
Datakit CatiaV5_3dRead≤ 2021.1cisa_csaf_otUS
Datakit CatiaV6_3dRead≤ 2021.1cisa_csaf_otUS
Datakit Jt3dReadPsr≤ 2021.1cisa_csaf_otUS
Datakit KeyShot≤ 10.1cisa_csaf_otUS
Datakit Step3dRead≤ 2021.1cisa_csaf_otUS
Datakit Ug3dReadPsr≤ 2021.1cisa_csaf_otUS
n/a Datakit Software libraries embedded in Luxion KeyShot software≤ CatiaV5_3dRead, CatiaV6_3dRead, Step3dRead, Ug3dReadPsr, Jt3dReadPsr modules in KeyShot Versions v10.1 and priorenisa_euvdEU
datakit crosscadware≤ 2021.1nvdUScpe:2.3:a:datakit:crosscadware:*:*:*:*:*:*:*:*
luxion keyshot≤ 10.1nvdUScpe:2.3:a:luxion:keyshot:*:*:*:*:*:*:*:*
siemens solid edge se2020 firmwareall versionsnvdUScpe:2.3:o:siemens:solid_edge_se2020_firmware:*:*:*:*:*:*:*:*
siemens solid edge se2021 firmwareall versionsnvdUScpe:2.3:o:siemens:solid_edge_se2021_firmware:*:*:*:*:*:*:*:*
Siemens Solid Edge SE2020≤ vers:all/*siemens_psirtDE
Siemens Solid Edge SE2021≤ vers:all/*siemens_psirtDE

advisories (2)

Vendor and ecosystem advisories describing this.

SSA-119468SSA-119468: Luxion KeyShot Vulnerabilities in Solid Edge2021-05-25csaf · siemens_psirtDE
The Solid Edge installation package includes a specific version of the third-party product KeyShot from Luxion, which may not contain the latest security fixes provided by Luxion. Siemens recommends to update KeyShot according to the information in the Luxion Security Advisory LSA-394129.
ICSA-21-145-01Datakit Libraries bundled in Luxion KeyShot2021-05-25icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could lead to execution of arbitrary code and disclosure of arbitrary files to unauthorized actors.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd siemens_psirt NVD CVE.org MITRE

published 2021-05-27modified 2026-06-17

references (12)

External citations — patches, advisories, analysis.

scry

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