{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-45328: ESF-IDF: Out-of-Bounds Write in ESP-TEE Secure Service Wrappers","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-45328","status":"final","version":"1","initial_release_date":"2026-06-10T00:33:43.997Z","current_release_date":"2026-06-10T13:00:35.618Z","revision_history":[{"date":"2026-06-10T00:33:43.997Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-45328 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-45328"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-45328"},{"category":"external","summary":"https://github.com/espressif/esp-idf/security/advisories/GHSA-mmgp-73p4-92xp","url":"https://github.com/espressif/esp-idf/security/advisories/GHSA-mmgp-73p4-92xp"},{"category":"external","summary":"https://github.com/espressif/esp-idf/commit/145ba4c42dc8283054cfde9a1c3470db7399192f","url":"https://github.com/espressif/esp-idf/commit/145ba4c42dc8283054cfde9a1c3470db7399192f"},{"category":"external","summary":"https://github.com/espressif/esp-idf/commit/440a5d1906502023f2a0fb0aecbdf0602d14acbf","url":"https://github.com/espressif/esp-idf/commit/440a5d1906502023f2a0fb0aecbdf0602d14acbf"},{"category":"external","summary":"https://github.com/espressif/esp-idf/commit/764626a1b7c85b943d207da08a2f8f7d7f3def4d","url":"https://github.com/espressif/esp-idf/commit/764626a1b7c85b943d207da08a2f8f7d7f3def4d"},{"category":"external","summary":"https://github.com/espressif/esp-idf/commit/7867f4a57560bf9fc4a931e37ba02b7a3e9f406b","url":"https://github.com/espressif/esp-idf/commit/7867f4a57560bf9fc4a931e37ba02b7a3e9f406b"},{"category":"external","summary":"https://github.com/espressif/esp-idf/commit/afd14ab113acd0ca369965404c99ac42e74d4fcd","url":"https://github.com/espressif/esp-idf/commit/afd14ab113acd0ca369965404c99ac42e74d4fcd"},{"category":"external","summary":"https://github.com/espressif/esp-idf/commit/eebabaff2fdc273b1530fe66e55fb3bcd181dfd6","url":"https://github.com/espressif/esp-idf/commit/eebabaff2fdc273b1530fe66e55fb3bcd181dfd6"}]},"product_tree":{"branches":[{"category":"vendor","name":"espressif","branches":[{"category":"product_name","name":"esp-idf","branches":[{"category":"product_version","name":"= 5.5.4","product":{"name":"espressif esp-idf = 5.5.4","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"= 6.0","product":{"name":"espressif esp-idf = 6.0","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-45328","title":"ESF-IDF: Out-of-Bounds Write in ESP-TEE Secure Service Wrappers","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":9.3,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1","CSAFPID-2"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1","CSAFPID-2"]}]}]}