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TI-2026-33126 Aliases CVE-2026-45329

ESF-IDF: Out-of-Bounds Read in ESP-TEE Secure Service Wrappers

Priority LOW 30CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.5.4 and 6.0, several ESP-TEE secure-service wrappers in esp_secure_services.c and esp_secure_services_iram.c validated only some of the caller-supplied pointer arguments, leaving input pointer arguments unchecked. Because the underlying TEE-protected hardware peripherals (e.g., ECC, SHA, SPI) run in RISC-V machine mode (M-mode) with full address-space access, a caller could supply pointers into TEE-exclusive memory as inputs, causing the peripheral to read TEE memory and return results derived from it to the REE. Depending on the wrapper, the result contains raw bytes from TEE memory, a computed function of TEE memory recoverable through repeated calls, or a single bit per call that forms an oracle for incremental disclosure of TEE-resident sensitive data. This issue has been patched in versions 5.5.5 and 6.0.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00117 1st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
espressifesp-idf= 6.0; = 5.5.4—No fix listedCNA
  • esp-idf Vendorespressif Affected = 6.0; = 5.5.4 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:espressif:esp-idf:5.5.4:*:*:*:*:*:*:*5.5.4Vulnerableespressif
cpe:2.3:a:espressif:esp-idf:6.0:*:*:*:*:*:*:*6.0Vulnerableespressif
  • cpe:2.3:a:espressif:esp-idf:5.5.4:*:*:*:*:*:*:* Versions 5.5.4 Vulnerable ·espressif
  • cpe:2.3:a:espressif:esp-idf:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·espressif

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-45329

References

Patch 4

  • TI-2024-22076 Buffer Overflow vulnerability in esp-idf v.5.1 allows a remote attacker to execute… CVSS 3.1MEDIUM 6.5
  • TI-2026-33125 ESF-IDF: Out-of-Bounds Write in ESP-TEE Secure Service Wrappers CVSS 3.1CRITICAL 9.3
  • TI-2025-32598 ESP-NOW Integer Underflow Vulnerability Advisory CVSS 4.0HIGH 7.2
  • TI-2022-08703 Espressif Bluetooth Mesh Stack Vulnerable to Out-of-bounds Write leading to memory buffer corruption CVSS 3.1HIGH 8.8
  • TI-2021-09371 The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not… CVSS 3.1HIGH 8.8
  • TI-2026-33292 ESF-IDF: Remote Null Pointer Dereference in WebSocket Server CVSS 3.1HIGH 7.5
See all 30 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences