How severe is CVE-2019-12586?

CVE-2019-12586 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-12586 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12586?

CVE-2019-12586 primarily affects Espressif Arduino-esp32. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-12586?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-12586 published?

CVE-2019-12586 was published on 2019-09-04 and last updated on 2026-06-17.

CVE-2019-12586

CVE-2019-12586 is a medium-severity vulnerability in Espressif Arduino-esp32 with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 3.3
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Espressif Arduino-esp32
Published: 2019-09-04
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2019-12586?: 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.
How severe is CVE-2019-12586?: CVE-2019-12586 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-12586 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12586?: CVE-2019-12586 primarily affects Espressif Arduino-esp32. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-12586?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-12586 published?: CVE-2019-12586 was published on 2019-09-04 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:espressif:arduino-esp32:*:*:*:*:*:*:*:*
cpe:2.3:a:espressif:arduino-esp32:1.0.3:-:*:*:*:*:*:*
cpe:2.3:a:espressif:arduino-esp32:1.0.3:rc1:*:*:*:*:*:*
cpe:2.3:a:espressif:arduino-esp32:1.0.3:rc2:*:*:*:*:*:*
cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:*
cpe:2.3:a:espressif:esp8266_nonos_sdk:*:*:*:*:*:*:*:*

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