CVE-2021-27396

mediumpriority · track · 32EPSS 0.015 · 73 %ileDEEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.45% (73rd) EPSS
CVSS 6.8 · medium
Is it mine?
5 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

A 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 stack based buffer overflow, a different vulnerability than CVE-2021-27398. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13279)

01

remediations

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

A vendor fix is available.

  • FixedTecnomatix Plant Simulationsiemens_psirt

    Update to V16.0.5 or later version

  • FixedTecnomatix Plant Simulationcisa_csaf_ot

    Update to V16.0.5 or later version

  • MitigationTecnomatix Plant Simulationsiemens_psirt

    Do not open untrusted SPP files from unknown sources

  • MitigationTecnomatix Plant Simulationcisa_csaf_ot

    Do not open untrusted SPP files from unknown sources

02

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
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · 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:O/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)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-121USCWE-121USCWE-121US
04

affected products (5)

Products and version ranges known to be affected.

05

advisories (2)

Vendor and ecosystem advisories describing this.

  • SSA-983548SSA-983548: Multiple SPP File Parsing Vulnerabilities in Tecnomatix Plant Simulation2021-05-11csaf · siemens_psirtDE

    Siemens Tecnomatix Plant Simulation has released an update for version V16.0 that fixes multiple vulnerabilities that could be triggered when the application reads SPP files. If a user is tricked to open a malicious file using the affected application, this could lead to a crash, and potentially also to arbitrary code execution or data extraction on the target host system. Siemens recommends to update to the latest version and to avoid opening of untrusted files from unknown sources.

  • ICSA-21-131-08Siemens Tecnomatix Plant Simulation2021-05-11icsa · cisa_csaf_otUS

    Siemens Tecnomatix Plant Simulation has released an update for version V16.0 that fixes multiple vulnerabilities that could be triggered when the application reads SPP files. If a user is tricked to open a malicious file using the affected application, this could lead to a crash, and potentially also to arbitrary code execution or data extraction on the target host system. Siemens recommends to update to the latest version and to avoid opening of untrusted files from unknown sources.

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcisa_csaf_otnvdsiemens_psirtNVDCVE.orgMITRE
published 2021-05-12modified 2026-06-17
08

references (9)

External citations — patches, advisories, analysis.

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