CVE-2019-12586 Denial of service in n/a
Attackers in radio range can crash Espressif ESP-IDF and ESP8266 devices by sending crafted EAP Success messages before method completion.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-12586?
CVE-2019-12586 is a medium-severity denial of service vulnerability in n/a, published on 4 Sep 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The EAP peer implementation in Espressif ESP-IDF 2.0.0 through 4.0.0 and ESP8266_NONOS_SDK 2.2.0 through 3.1.0 processes EAP Success messages before any EAP method completion or failure, which allows attackers in radio range to cause a denial of service (crash) via a crafted message.
Which versions are affected by CVE-2019-12586?
It affects 3 products.
Products include Espressif Arduino-Esp32, Espressif Esp-Idf, Espressif Esp8266 Nonos Sdk.
How do I fix CVE-2019-12586?
No fix has been published for CVE-2019-12586 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-12586 being exploited?
There is no known exploitation of CVE-2019-12586 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in n/a
- CVE-2026-42854 arduino-esp32: Stack buffer overflow in WebServer multipart boundary parsing leads to remote crash potential RCE
- CVE-2026-41429 Improper validation of NBNS name_len in arduino-esp32 NetBIOS leads to memory corruption
- CVE-2026-42855 arduino-esp32: Digest authentication URI mismatch bypass in WebServer allows cross-resource replay attack
Sources
Also known as GHSA-jj4g-g9rr-33cr.