CVE-2022-46400

MEDIUM

Microchip RN4870 <1.43 - Auth Bypass

Title source: llm

Description

The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) allows attackers to bypass passkey entry in legacy pairing.

References (4)

Core 4

Core References

Product

https://microchip.com

Exploit, Technical Description, Third Party Advisory

https://www.computer.org/csdl/proceedings-article/sp/2023/933600a521/1He7Yja1AYM

Third Party Advisory

https://www.computer.org/csdl/proceedings/sp/2023/1He7WWuJExG

Vendor Advisory

https://www.microchip.com/en-us/products/wireless-connectivity/software-vulnerability-response/deviating-behaviors-in-bluetooth-le

Scores

CVSS v3 5.4

EPSS 0.0062

EPSS Percentile 45.1%

Attack Vector ADJACENT_NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-287

Status published

Products (9)

microchip/bm70_firmware 1.43

microchip/bm71_firmware 1.43

microchip/bm78_firmware 1.43

microchip/bm83_firmware 1.43

microchip/is1870_firmware 1.43

microchip/is1871_firmware 1.43

microchip/pic_lightblue_explorer_demo_firmware 4.2_dt100112

microchip/rn4870_firmware 1.43

microchip/rn4871_firmware 1.43

Published Dec 19, 2022

Tracked Since Feb 18, 2026