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TI-2020-10048 Aliases CVE-2020-12638GHSA-jf2p-5456-5593

An encryption-bypass issue was discovered on Espressif ESP-IDF devices through 4.2…

Priority LOW 30CWE-287Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass, Information disclosure
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287 and CWE-319.

Summary

An encryption-bypass issue was discovered on Espressif ESP-IDF devices through 4.2, ESP8266_NONOS_SDK devices through 3.0.3, and ESP8266_RTOS_SDK devices through 3.3. Broadcasting forged beacon frames forces a device to change its authentication mode to OPEN, effectively disabling its 802.11 encryption.

Why it matters now

EPSS 0.0045 39th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:*up to 4.2Vulnerableespressif
cpe:2.3:a:espressif:esp8266_nonos_sdk:*:*:*:*:*:*:*:*up to 3.0.3Vulnerableespressif
cpe:2.3:a:espressif:esp8266_rtos_sdk:*:*:*:*:*:*:*:*up to 3.3Vulnerableespressif
  • cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:* Versions up to 4.2 Vulnerable ·espressif
  • cpe:2.3:a:espressif:esp8266_nonos_sdk:*:*:*:*:*:*:*:* Versions up to 3.0.3 Vulnerable ·espressif
  • cpe:2.3:a:espressif:esp8266_rtos_sdk:*:*:*:*:*:*:*:* Versions up to 3.3 Vulnerable ·espressif

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-12638
  2. 2026-10-03 Alias added: GHSA-jf2p-5456-5593

References

Exploit 1

Advisory 3

  • 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