CVE-2021-38111 | BDVDB-2026-158129 Detail

Description#

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: adjacent.

Weaknesses#

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

References#

Exploit#

No public exploit known

History#

Version 12021-08-04Record published in the CVE List.
Version 22025-05-05Most recent update recorded in the CVE List.

Published

Published: 2021-08-04
Last modified: 2025-05-05

Vendor information

Vendor: Not stated
Product: Not stated

Score

8.8 High

EPSS

1.3%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 71.3.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

No version data in the source record.

Scoring System

CVSS v4.0

Not available

CVSS v3.1

8.8 High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Metric breakdown
Attack Vector	Adjacent
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).