CVE-2026-45329

TEE secret disclosure via unchecked input pointers

Published Jun 10, 2026 · Updated Jun 10, 2026

Out-of-bounds reads in ESP-IDF 5.5.4 and 6.0 allow local users with REE code execution to disclose TEE-resident secrets. Secure-service wrappers in esp_secure_services.c and esp_secure_services_iram.c pass unchecked input pointers to M-mode peripherals, which read TEE-only addresses and return raw bytes, derived values, or oracle bits. Exploitation requires local code execution in an unprivileged REE application on an ESP32-C5, ESP32-C6, ESP32-C61, or ESP32-H2; it crosses the REE/TEE boundary but does not alter data or interrupt service.

CVSS severity7.1
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds reads in ESP-IDF 5.5.4 and 6.0 allow local users with REE code execution to disclose TEE-resident secrets. Secure-service wrappers in esp_secure_services.c and esp_secure_services_iram.c pass unchecked input pointers to M-mode peripherals, which read TEE-only addresses and return raw bytes, derived values, or oracle bits. Exploitation requires local code execution in an unprivileged REE application on an ESP32-C5, ESP32-C6, ESP32-C61, or ESP32-H2; it crosses the REE/TEE boundary but does not alter data or interrupt service.

The record

CVE
CVE-2026-45329
Published
Jun 10, 2026
Updated
Jun 10, 2026
Vendor
Espressif Systems
Product
ESP-IDF
Classifications
CWE-125, CWE-200, CWE-20, T1005
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion== 5.5.4
  2. Affected versionversion== 6.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Espressif Systems · ESP-IDFversion== 5.5.4; version== 6.0

Published CVSS scores

7.1GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-20Improper Input Validation
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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