Is CVE-2021-27398 in the CISA KEV catalog?

No. CVE-2021-27398 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-27398?

CVE-2021-27398 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-27398?

CVE-2021-27398 has an EPSS score of 1.45% (70th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-27398?

Upgrade tecnomatix plant simulation to 16.0.5 or later.

CVE & CISA-KEV Catalog

CVE-2021-27398

HIGHEPSS 70th pctl

7.8

CVSS v3

NVD

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 stack based buffer overflow, a different vulnerability than CVE-2021-27396. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-13290)

CWE-121Stack-based Buffer Overflow

How to fix

Remediation Available

tecnomatix plant simulationNVD

Affected:< 16.0.5Fixed in:16.0.5CVE-2021-27398derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

1.45%probability of exploitation in 30 days

70thpercentile

Elevated risk: more likely to be exploited than 70% of all known CVEs.

References

Vendor Advisory1

cert-portal.siemens.com

Third-Party Advisory1

zerodayinitiative.com

Related Vulnerabilities

Other CWE-121 (Stack-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2009-0927	High	8.8	97%	KEV	Fix
CVE-2020-10924	High	8.8	87%	-	-
CVE-2022-20705	Critical	10.0	80%	-	-

Embed a live status badge for CVE-2021-27398

Markdown

[![CVE-2021-27398](https://tridentstack.com/cve/badge/CVE-2021-27398.svg)](https://tridentstack.com/cve/CVE-2021-27398)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-27398"><img src="https://tridentstack.com/cve/badge/CVE-2021-27398.svg" alt="CVE-2021-27398"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.