CVE-2021-38111

HIGHNVD 8.88.8—Trending — 3 sources updated this week

8.8

The DEF CON 27 badge allows remote attackers to exploit a buffer overflow by sending an oversized packet via the NFMI (Near Field Magnetic Induction) protocol.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 60.5%
KEV: Not listed

Published

August 4, 2021

Last Modified

May 5, 2025

References (4)

cve@mitrehttps://defcon.org/html/defcon-29/dc-29-speakers.html#kintigh
cve@mitrehttps://github.com/skintigh/defcon27_badge_sdr
af854a3a-2127-422b-91ae-364da2661108https://defcon.org/html/defcon-29/dc-29-speakers.html#kintigh
af854a3a-2127-422b-91ae-364da2661108https://github.com/skintigh/defcon27_badge_sdr

Weakness Classification(1)

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

CWE-120Buffer Copy without Checking Size (Classic Buffer Overflow)

Data Freshness Timeline

(refreshed 12× in last 7d / 12× 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.

2026-05-28 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
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 12:38 UTCEG score recompute
2026-05-26 12:37 UTCGHSA enrichment
2026-05-26 12:37 UTCGHSA enrichment
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-38111?

CVE-2021-38111 is a high vulnerability published on August 4, 2021. The DEF CON 27 badge allows remote attackers to exploit a buffer overflow by sending an oversized packet via the NFMI (Near Field Magnetic Induction) protocol.

When was CVE-2021-38111 disclosed?

CVE-2021-38111 was first published in the National Vulnerability Database on August 4, 2021, with the most recent update on May 5, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-38111 actively exploited?

CVE-2021-38111 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 60.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-38111?

CVE-2021-38111 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2021-38111?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-38111, 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-2021-38111

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CVE-2021-38111

📅 Published

🔄 Last Modified

🔗 References (4)