CVE-2025-66409

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.

CVSS v3.1 Score

9.1

CRITICAL

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

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

Affected Products

Vendor	Product	Versions
espressif	esp-idf	< 5.1.6
espressif	esp-idf	5.2 — 5.2.6
espressif	esp-idf	5.3 — 5.3.4
espressif	esp-idf	5.4 — 5.4.3
espressif	esp-idf	5.5 — 5.5.1

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2025-66409? +

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. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2025-66409? +

CVE-2025-66409 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-66409? +

CVE-2025-66409 affects products from espressif, specifically: esp-idf. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-66409? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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