How severe is CVE-2021-27397?

CVE-2021-27397 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-27397 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27397?

CVE-2021-27397 affects Siemens Tecnomatix Plant Simulation. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27397?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-27397 published?

CVE-2021-27397 was published on 2021-05-12 and last updated on 2026-06-17.

CVE-2021-27397

CVE-2021-27397 is a high-severity vulnerability in Siemens Tecnomatix Plant Simulation with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Siemens Tecnomatix Plant Simulation
Published: 2021-05-12
Last modified: 2026-06-17

Description

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 memory corruption condition. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13287)

Frequently asked questions

What is CVE-2021-27397?: 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 memory corruption condition. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13287)
How severe is CVE-2021-27397?: CVE-2021-27397 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-27397 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27397?: CVE-2021-27397 affects Siemens Tecnomatix Plant Simulation. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27397?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-27397 published?: CVE-2021-27397 was published on 2021-05-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:siemens:tecnomatix_plant_simulation:*:*:*:*:*:*:*:*

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