CVE-2021-38111

8.8 HIGH

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

Published: 2021-08-04 · Last updated: 2026-06-17

Severity and scoring

CVSS: 8.8 HIGH
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-120

Affected products

Vendor	Product
defcon	def_con_27_firmware

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-38111
[Exploit reference]https://defcon.org/html/defcon-29/dc-29-speakers.html#kintigh
[Other]https://github.com/skintigh/defcon27_badge_sdr
[Exploit reference]https://defcon.org/html/defcon-29/dc-29-speakers.html#kintigh
[Other]https://github.com/skintigh/defcon27_badge_sdr

Related CVEs

Same CWE

CVE-2026-12328 — Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151 (8.1 HIGH)
CVE-2026-12192 — A vulnerability was determined in GALAYOU Y4 1.0.0 (8.8 HIGH)
CVE-2026-36818 — Shenzhen Tenda Technology Co., Ltd Tenda W20E v15.11.0.6 was discovered to contain a buffer overflow in the wewifiWhiteUserInfo parameter... (7.5 HIGH)
CVE-2026-36817 — Shenzhen Tenda Technology Co., Ltd Tenda W15E v15.11.0.10 was discovered to contain a buffer overflow in the webAuthWhiteUserInfo paramet... (7.5 HIGH)
CVE-2026-36816 — Shenzhen Tenda Technology Co., Ltd Tenda W15E v15.11.0.10 was discovered to contain a buffer overflow in the wewifiWhiteUserInfo paramete... (7.5 HIGH)