CVE-2021-4228

MEDIUMNVD 5.88.1▲

5.8

Use of hard-coded TLS certificate by default allows an attacker to perform Man-in-the-Middle (MitM) attacks even in the presence of the HTTPS connection. This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.00.0.

CVSS v3: 5.8
EG Score: 8.1(medium)
EPSS: 74.5%
KEV: Not listed

Published

October 24, 2022

Last Modified

November 21, 2024

References (4)

prodsec@nozominetworkshttps://www.nozominetworks.com/blog/vulnerabilities-in-bmc-firmware-affect-ot-iot-device-security-part-1/
prodsec@nozominetworkshttps://www.nozominetworks.com/labs/vulnerability-advisories/cve-2021-4228/
af854a3a-2127-422b-91ae-364da2661108https://www.nozominetworks.com/blog/vulnerabilities-in-bmc-firmware-affect-ot-iot-device-security-part-1/
af854a3a-2127-422b-91ae-364da2661108https://www.nozominetworks.com/labs/vulnerability-advisories/cve-2021-4228/

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 9× 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 13:43 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 13:16 UTCEG score recompute
2026-05-25 13:16 UTCGHSA enrichment
2026-05-24 01:21 UTCOSV refresh

Frequently asked(5)

What is CVE-2021-4228?

CVE-2021-4228 is a medium vulnerability published on October 24, 2022. Use of hard-coded TLS certificate by default allows an attacker to perform Man-in-the-Middle (MitM) attacks even in the presence of the HTTPS connection. This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.00.0.

When was CVE-2021-4228 disclosed?

CVE-2021-4228 was first published in the National Vulnerability Database on October 24, 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-2021-4228 actively exploited?

CVE-2021-4228 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 74.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-4228?

CVE-2021-4228 has a CVSS v3 base score of 5.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.1.

How do I remediate CVE-2021-4228?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-4228, 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-2021-4228

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CVE-2021-4228

📅 Published

🔄 Last Modified

🔗 References (4)