CVE-2021-43978

HIGHNVD 7.18.1▲

7.1

Allegro WIndows 3.3.4152.0, embeds software administrator database credentials into its binary files, which allows users to access and modify data using the same credentials.

CVSS v3: 7.1
EG Score: 8.1(medium)
EPSS: 44.7%
KEV: Not listed

Published

December 8, 2021

Last Modified

May 30, 2025

References (5)

cve@mitrehttps://cds.thalesgroup.com/en/tcs-cert/CVE-2021-43978
cve@mitrehttps://excellium-services.com/cert-xlm-advisory/CVE-2021-43978
cve@mitrehttps://www.allegro.be/
af854a3a-2127-422b-91ae-364da2661108https://excellium-services.com/cert-xlm-advisory/CVE-2021-43978
af854a3a-2127-422b-91ae-364da2661108https://www.allegro.be/

Weakness Classification(1)

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

CWE-522Insufficiently Protected Credentials

Data Freshness Timeline

(refreshed 11× in last 7d / 20× 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.

2026-06-04 13:10 UTCepss_batch
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2026-05-29 13:42 UTCepss_batch
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2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-43978?

CVE-2021-43978 is a high vulnerability published on December 8, 2021. Allegro WIndows 3.3.4152.0, embeds software administrator database credentials into its binary files, which allows users to access and modify data using the same credentials.

When was CVE-2021-43978 disclosed?

CVE-2021-43978 was first published in the National Vulnerability Database on December 8, 2021, with the most recent update on May 30, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-43978 actively exploited?

CVE-2021-43978 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 44.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-43978?

CVE-2021-43978 has a CVSS v3 base score of 7.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.1.

How do I remediate CVE-2021-43978?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-43978, 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

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CVE-2021-43978

📅 Published

🔄 Last Modified

🔗 References (5)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-43978?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (5)

Frequently asked(5)

Related CVEs(same CWE)