CVE-2025-44557

HIGH

Cypress PSoC4 v3.66 - Authentication Bypass via Crafted Pairing Failed Packet

Title source: llm

Description

A state machine transition flaw in the Bluetooth Low Energy (BLE) stack of Cypress PSoC4 v3.66 allows attackers to bypass the pairing process and authentication via a crafted pairing_failed packet.

References (2)

Core 2

Core References

Various Sources

https://github.com/yangting111/BLE_TEST/blob/main/result/PoC/Cypress/Auth_bypass.md

View Writeup ZIP pw:eip

Various Sources

https://www.infineon.com/cms/en/design-support/tools/sdk/psoc-software/psoc-4-components/psoc-creator-component-datasheet-bluetooth-low-energy-ble/

Scores

CVSS v3 8.1

EPSS 0.0026

EPSS Percentile 16.7%

Attack Vector ADJACENT_NETWORK

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact partial

Details

CWE

CWE-303

Status published

Published Jun 27, 2025

Tracked Since Feb 18, 2026