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Vulnerability record · CVE-2019-12588 · published 4 September 2019

CVE-2019-12588: Espressif arduino esp8266 improper input validation vulnerability

EEspressif · Arduino Esp8266

The client 802.11 mac implementation in Espressif ESP8266_NONOS_SDK 2.2.0 through 3.1.0 does not validate correctly the RSN AuthKey suite list count in beacon frames, probe responses, and association responses, which allows attackers in radio range to cause a denial of service (crash) via a crafted message.

6.5 CVSS 3.1 Medium EPSS 1.3% · top 30.4% CWE-20 · Improper input validation
6.5CVSS 3.1 base score, v2 3.3
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

The client 802.11 mac implementation in Espressif ESP8266_NONOS_SDK 2.2.0 through 3.1.0 does not validate correctly the RSN AuthKey suite list count in beacon frames, probe responses, and association responses, which allows attackers in radio range to cause a denial of service (crash) via a crafted message.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/Matheus-Garbelini/esp32_esp8266_attacks ExploitThird Party Advisory
https://github.com/espressif Product
https://matheus-garbelini.github.io/home/post/esp8266-beacon-frame-crash/ ExploitThird Party Advisory
https://github.com/Matheus-Garbelini/esp32_esp8266_attacks ExploitThird Party Advisory
https://github.com/espressif Product
https://matheus-garbelini.github.io/home/post/esp8266-beacon-frame-crash/ ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-12588), CISA KEV, FIRST EPSS (scores of 2026-10-13). This page is refreshed as NVD updates the record.