CVE-2021-27389

CRITICALNVD 9.89.8—

9.8

A vulnerability has been identified in Opcenter Quality (All versions < V12.2), QMS Automotive (All versions < V12.30). A private sign key is shipped with the product without adequate protection.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 61.4%
KEV: Not listed

Published

April 22, 2021

Last Modified

November 21, 2024

References (2)

productcert@siemenshttps://cert-portal.siemens.com/productcert/pdf/ssa-788287.pdf
af854a3a-2127-422b-91ae-364da2661108https://cert-portal.siemens.com/productcert/pdf/ssa-788287.pdf

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-321Use of Hard-coded Cryptographic Key

Data Freshness Timeline

(refreshed 7× in last 7d / 7× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 17:52 UTCEG score recompute
2026-05-26 17:52 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-27389?

CVE-2021-27389 is a critical vulnerability published on April 22, 2021. A vulnerability has been identified in Opcenter Quality (All versions < V12.2), QMS Automotive (All versions < V12.30). A private sign key is shipped with the product without adequate protection.

When was CVE-2021-27389 disclosed?

CVE-2021-27389 was first published in the National Vulnerability Database on April 22, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-27389 actively exploited?

CVE-2021-27389 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 61.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-27389?

CVE-2021-27389 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-27389?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-27389, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-27389

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Is Your Infrastructure Affected by CVE-2021-27389?

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CVE-2021-27389

📅 Published

🔄 Last Modified

🔗 References (2)