CVE-2026-45328
Espressif Esp-idf buffer overflow
- Published10 Jun 2026
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 3.1 breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/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/145ba4c42dc8283054cfde9a1c3470db7399192f
- https://github.com/espressif/esp-idf/commit/440a5d1906502023f2a0fb0aecbdf0602d14acbf
- https://github.com/espressif/esp-idf/commit/764626a1b7c85b943d207da08a2f8f7d7f3def4d
- https://github.com/espressif/esp-idf/commit/7867f4a57560bf9fc4a931e37ba02b7a3e9f406b
- https://github.com/espressif/esp-idf/commit/afd14ab113acd0ca369965404c99ac42e74d4fcd
- https://github.com/espressif/esp-idf/commit/eebabaff2fdc273b1530fe66e55fb3bcd181dfd6
References
- https://github.com/espressif/esp-idf/commit/145ba4c42dc8283054cfde9a1c3470db7399192f
- https://github.com/espressif/esp-idf/commit/440a5d1906502023f2a0fb0aecbdf0602d14acbf
- https://github.com/espressif/esp-idf/commit/764626a1b7c85b943d207da08a2f8f7d7f3def4d
- https://github.com/espressif/esp-idf/commit/7867f4a57560bf9fc4a931e37ba02b7a3e9f406b
- https://github.com/espressif/esp-idf/commit/afd14ab113acd0ca369965404c99ac42e74d4fcd
- https://github.com/espressif/esp-idf/commit/eebabaff2fdc273b1530fe66e55fb3bcd181dfd6
- https://github.com/espressif/esp-idf/security/advisories/GHSA-mmgp-73p4-92xp
Related CVEs
Recent high-severity vulnerabilities sharing a weakness type.
Frequently asked
Is CVE-2026-45328 being actively exploited?
CVE-2026-45328 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.18%.
How severe is CVE-2026-45328?
CVE-2026-45328 has a CVSS 3.1 base score of 9.3, rated critical. EPSS estimates a 0.18% probability of exploitation.
Which products are affected by CVE-2026-45328?
Affected products include Espressif Esp-idf.
How do I fix CVE-2026-45328?
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-2026-45328 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.