Buffer overflow in Espressif Esp-Idf
CVE-2026-45328
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
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
EPSS: 0.002 (6.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
- Espressif Esp-Idf — versions 5.5.4, = 5.5.4, 6.0
Weakness classification (CWE)
References
- github.com/espressif/esp-idf/commit/145ba4c42dc8283054cfde9a1c3470db7399192f (Patch)
- github.com/espressif/esp-idf/commit/440a5d1906502023f2a0fb0aecbdf0602d14acbf (Patch)
- github.com/espressif/esp-idf/commit/764626a1b7c85b943d207da08a2f8f7d7f3def4d (Patch)
- github.com/espressif/esp-idf/commit/7867f4a57560bf9fc4a931e37ba02b7a3e9f406b (Patch)
- github.com/espressif/esp-idf/commit/afd14ab113acd0ca369965404c99ac42e74d4fcd (Patch)
- github.com/espressif/esp-idf/commit/eebabaff2fdc273b1530fe66e55fb3bcd181dfd6 (Patch)
- github.com/espressif/esp-idf/security/advisories/GHSA-mmgp-73p4-92xp (Patch, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-45328?
- CVE-2026-45328 is a critical-severity vulnerability in Espressif Esp-Idf, classified under Improper Input Validation. CVSS score: 9.3/10. Published 2026-06-10.
- How severe is CVE-2026-45328?
- Critical severity. CVSS v3 base score is 9.3 out of 10.