CVE-2021-40903

CRITICALNVD 9.89.8—

9.8

A vulnerability in Antminer Monitor 0.50.0 exists because of backdoor or misconfiguration inside a settings file in flask server. Settings file has a predefined secret string, which would be randomly generated, however it is static.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 93.8%
KEV: Not listed

Published

June 17, 2022

Last Modified

November 21, 2024

References (6)

cve@mitrehttps://github.com/anselal/antminer-monitor
cve@mitrehttps://packetstormsecurity.com/files/164048/Antminer-Monitor-0.5.0-Authentication-Bypass.html
cve@mitrehttps://www.exploit-db.com/exploits/50267
af854a3a-2127-422b-91ae-364da2661108https://github.com/anselal/antminer-monitor
af854a3a-2127-422b-91ae-364da2661108https://packetstormsecurity.com/files/164048/Antminer-Monitor-0.5.0-Authentication-Bypass.html
af854a3a-2127-422b-91ae-364da2661108https://www.exploit-db.com/exploits/50267

Weakness Classification(2)

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

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.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-23 09:01 UTCEG score recompute
2026-05-23 09:01 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-40903?

CVE-2021-40903 is a critical vulnerability published on June 17, 2022. A vulnerability in Antminer Monitor 0.50.0 exists because of backdoor or misconfiguration inside a settings file in flask server. Settings file has a predefined secret string, which would be randomly generated, however it is static.

When was CVE-2021-40903 disclosed?

CVE-2021-40903 was first published in the National Vulnerability Database on June 17, 2022, 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-2021-40903 actively exploited?

CVE-2021-40903 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 93.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-40903?

CVE-2021-40903 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-40903?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-40903, 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-2021-40903

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-40903?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)