High severity · published Jun 10, 2026
CVE-2026-45328
ESF-IDF: Out-of-Bounds Write in ESP-TEE Secure Service Wrappers
8.8
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ES
esp-idf · espressif
= 5.5.4; = 6.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45328
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-45328
Patch
https://github.com/espressif/esp-idf/commit/145ba4c42dc8283054cfde9a1c3470db7399192f
Patch
https://github.com/espressif/esp-idf/commit/440a5d1906502023f2a0fb0aecbdf0602d14acbf
Patch
https://github.com/espressif/esp-idf/commit/764626a1b7c85b943d207da08a2f8f7d7f3def4d
Patch
https://github.com/espressif/esp-idf/commit/7867f4a57560bf9fc4a931e37ba02b7a3e9f406b
Patch
https://github.com/espressif/esp-idf/commit/afd14ab113acd0ca369965404c99ac42e74d4fcd
Patch
https://github.com/espressif/esp-idf/commit/eebabaff2fdc273b1530fe66e55fb3bcd181dfd6
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