What’s Vulnerable › Vulnerabilities

CVE-2020-13594

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-08-31 · updated 2026-06-17
• Weakness: CWE-20

Description

The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.2 and earlier (for ESP32 devices) does not properly restrict the channel map field of the connection request packet on reception, allowing attackers in radio range to cause a denial of service (crash) via a crafted packet.

Affected products

• espressif esp-idf: through 4.2

References

• https://asset-group.github.io/cves.html
• https://asset-group.github.io/disclosures/sweyntooth/
• https://github.com/espressif/esp32-bt-lib
• https://asset-group.github.io/cves.html
• https://asset-group.github.io/disclosures/sweyntooth/
• https://github.com/espressif/esp32-bt-lib

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