What’s Vulnerable › Vulnerabilities

CVE-2025-66409: ESF-IDF has an Out-of-Bounds Read in ESP32 Bluetooth AVRCP Command Handling

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-02 · updated 2026-10-18
• Weakness: CWE-125

Description

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In 5.5.1, 5.4.3, 5.3.4, 5.2.6, 5.1.6, and earlier, when AVRCP is enabled on ESP32, receiving a malformed VENDOR DEPENDENT command from a peer device can cause the Bluetooth stack to access memory before validating the command buffer length. This may lead to an out-of-bounds read, potentially exposing unintended memory content or causing unexpected behavior.

Affected products

• espressif esp-idf: through 5.1.6; from 5.2 through 5.2.6; from 5.3 through 5.3.4; from 5.4 through 5.4.3; from 5.5 through 5.5.1

References

• https://github.com/espressif/esp-idf/commit/075ed218cadb8088155521cd8a795d8a626519fb
• https://github.com/espressif/esp-idf/commit/2f788e59ee361eee230879ae2ec9cf5c893fe372
• https://github.com/espressif/esp-idf/commit/798029129a71c802cff0e75eb59f902bca8f1946
• https://github.com/espressif/esp-idf/commit/999710fccf95ae128fe51b5679d6b7c75c50d902
• https://github.com/espressif/esp-idf/commit/d5db5f60fc1dcfdd8cd3ee898fdefaa272988ace
• https://github.com/espressif/esp-idf/commit/daeeba230327176b9627b1caa94acdc54065c4b7
• https://github.com/espressif/esp-idf/security/advisories/GHSA-qhf9-vr2h-jh96

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