CVE-2022-46400 Auth bypass in n/a

Medium 5.4 Published 19 Dec 2022 Updated 17 Apr 2025

Attackers can bypass passkey entry in legacy pairing on Microchip RN4870 modules, allowing unauthorized Bluetooth connections.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-46400?

CVE-2022-46400 is a medium-severity authentication bypass vulnerability in n/a, published on 19 Dec 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-287

Which versions are affected by CVE-2022-46400?

It affects 9 products.

Products include Microchip Bm70 Firmware, Microchip Bm71 Firmware, Microchip Bm78 Firmware, Microchip Bm83 Firmware, Microchip Is1870 Firmware, Microchip Is1871 Firmware and 3 more.

How do I fix CVE-2022-46400?

No fix has been published for CVE-2022-46400 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2022-46400 being exploited?

There is no known exploitation of CVE-2022-46400 in the wild and no public exploit code.

Sources

Also known as GHSA-g8ch-8r7r-4wwj.