PatchSiren cyber security CVE debrief

CVE-2026-45328 espressif CVE debrief

A critical vulnerability was found in Espressif Internet of Things (IOT) Development Framework (ESF-IDF). The vulnerability is caused by the esp_tee component exposing 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.

Vendor: espressif
Product: esp-idf
CVSS: CRITICAL 9.3
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-10
Original CVE updated: 2026-06-11
Advisory published: 2026-06-10
Advisory updated: 2026-06-11

Who should care

Users of Espressif Internet of Things (IOT) Development Framework (ESF-IDF) versions 5.5.4 and 6.0 should update to versions 5.5.5 and 6.0.1 respectively.

Technical summary

The vulnerability has a CVSS score of 9.3 and is classified as CRITICAL. The affected products are Espressif ESP-IDF versions 5.5.4 and 6.0. The vulnerability is caused by the esp_tee component exposing secure-service wrappers in esp_secure_services.c and esp_secure_services_iram.c.

Defensive priority

high

Recommended defensive actions

Update to versions 5.5.5 and 6.0.1 respectively.
Refer to [ref-4](ref-4) for patch details.
Refer to [ref-10](ref-10) for vendor advisory.

Evidence notes

The vulnerability was published on 2026-06-10T02:16:32.687Z and modified on 2026-06-11T18:15:51.000Z.

Sources and references

Verified primary and authoritative sources

CVE-2026-45328 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-45328

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-45328 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45328

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Mitigation or vendor reference
Unverified legacy reference

URL: https://github.com/espressif/esp-idf/commit/145ba4c42dc8283054cfde9a1c3470db7399192f

[email protected] - Patch
Mitigation or vendor reference
Unverified legacy reference

URL: https://github.com/espressif/esp-idf/commit/440a5d1906502023f2a0fb0aecbdf0602d14acbf

[email protected] - Patch
Mitigation or vendor reference
Unverified legacy reference

URL: https://github.com/espressif/esp-idf/commit/764626a1b7c85b943d207da08a2f8f7d7f3def4d

[email protected] - Patch
Mitigation or vendor reference
Unverified legacy reference

URL: https://github.com/espressif/esp-idf/commit/7867f4a57560bf9fc4a931e37ba02b7a3e9f406b

[email protected] - Patch
Mitigation or vendor reference
Unverified legacy reference

URL: https://github.com/espressif/esp-idf/commit/afd14ab113acd0ca369965404c99ac42e74d4fcd

[email protected] - Patch
Mitigation or vendor reference
Unverified legacy reference

URL: https://github.com/espressif/esp-idf/commit/eebabaff2fdc273b1530fe66e55fb3bcd181dfd6

[email protected] - Patch
Mitigation or vendor reference
Unverified legacy reference

URL: https://github.com/espressif/esp-idf/security/advisories/GHSA-mmgp-73p4-92xp

[email protected] - Mitigation, Patch, Vendor Advisory

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.