What is CVE-2026-113780?

CVE-2026-113780 is a critical-severity vulnerability in Espressif Esp-Idf, classified under Out-of-bounds Write. CVSS score: 9.3/10. Published 2026-11-04.

How severe is CVE-2026-113780?

Critical severity. CVSS v3 base score is 9.3 out of 10.

Buffer overflow in Espressif Esp-Idf

CVE-2026-113780

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. From 5.5.5 until 5.5.6, 6.0.4, and 6.1.1, the esp_tee trap entry in esp_tee_vectors_plic.S and esp_tee_vectors_clic.S saves a caller-controlled register frame through the REE-supplied stack pointer before switching to the trusted TEE stack or validating the pointer. A local unprivileged REE application can direct this machine-mode write into TEE-exclusive memory on ESP32-C5, ESP32-C6, ESP32-C61, and ESP32-H2 devices, breaking the REE/TEE isolation boundary and potentially corrupting TEE control-flow data for code execution, denial of service, or system crashes. Both secure-service ecall and interrupt entry paths contain the vulnerable ordering. This issue is fixed in version 5.5.6 and is scheduled to be fixed in versions 6.0.4 and 6.1.1.

Vulnerability class: Buffer Overflow

Published 2026-11-04 · last modified 2026-11-05.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Espressif Esp-Idf — versions < 5.5.6, >= 6.0.0, < 6.0.4, >= 6.1.0, < 6.1.1

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-113780?: CVE-2026-113780 is a critical-severity vulnerability in Espressif Esp-Idf, classified under Out-of-bounds Write. CVSS score: 9.3/10. Published 2026-11-04.
How severe is CVE-2026-113780?: Critical severity. CVSS v3 base score is 9.3 out of 10.