CVE-2025-66409
Espressif Esp-idf out-of-bounds read
- Published2 Dec 2025
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 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HAffected products
Remediation
No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.
- 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
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
Related CVEs
Recent high-severity vulnerabilities sharing a weakness type.
Frequently asked
Is CVE-2025-66409 being actively exploited?
CVE-2025-66409 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.63%.
How severe is CVE-2025-66409?
CVE-2025-66409 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.63% probability of exploitation.
Which products are affected by CVE-2025-66409?
Affected products include Espressif Esp-idf.
How do I fix CVE-2025-66409?
Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2025-66409 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.