Is CVE-2020-11957 actively exploited?

No active exploitation of CVE-2020-11957 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-11957 be exploited remotely?

Partially. CVE-2020-11957 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2020-11957?

CVE-2020-11957 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2020-11957

CWE-331Published: June 9, 2020· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

The Bluetooth Low Energy implementation in Cypress PSoC Creator BLE 4.2 component versions before 3.64 generates a random number (Pairing Random) with significantly less entropy than the specified 128 bits during BLE pairing. This is the case for both authenticated and unauthenticated pairing with both LE Secure Connections as well as LE Legacy Pairing. A predictable or brute-forceable random number allows an attacker (in radio range) to perform a MITM attack during BLE pairing.

NVD Source

Technical Analysis

CVE-2020-11957 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.5.