Vulnerability · Published Jun 10, 2026 · Assigned by GitHub_M

CVE-2026-45328ESF-IDF: Out-of-Bounds Write in ESP-TEE Secure Service Wrappers

Critical 9.3

In plain English

A critical-severity improper input validation in esp-idf from espressif. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).

Severity (CVSS 3.1)9.3Critical

Exploit odds (30 days)0.1%top 97.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.5.4 and 6.0, the esp_tee component exposes secure-service wrappers in esp_secure_services.c and esp_secure_services_iram.c that bridge calls from the user application (i.e. the REE) to TEE-protected hardware peripherals (AES, SHA, ECC, HMAC, SPI, MMU, WDT) and to the security feature like attestation, OTA updates, secure storage. This issue has been patched in versions 5.5.5 and 6.0.1.

Affected products (as reported)

Vendor	Product	Versions
espressif	esp-idf	= 5.5.4= 6.0

Weakness: CWE-20, CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

https://github.com/espressif/esp-idf/security/advisories/GHSA-mmgp-73p4-92xp x_refsource_CONFIRM
https://github.com/espressif/esp-idf/commit/145ba4c42dc8283054cfde9a1c3470db7399192f x_refsource_MISC
https://github.com/espressif/esp-idf/commit/440a5d1906502023f2a0fb0aecbdf0602d14acbf x_refsource_MISC
https://github.com/espressif/esp-idf/commit/764626a1b7c85b943d207da08a2f8f7d7f3def4d x_refsource_MISC
https://github.com/espressif/esp-idf/commit/7867f4a57560bf9fc4a931e37ba02b7a3e9f406b x_refsource_MISC
https://github.com/espressif/esp-idf/commit/afd14ab113acd0ca369965404c99ac42e74d4fcd x_refsource_MISC
https://github.com/espressif/esp-idf/commit/eebabaff2fdc273b1530fe66e55fb3bcd181dfd6 x_refsource_MISC