---
id: CVE-2026-19293
title: "SMP security request (from peripheral)\_does not include the maximum\nencryption key size supported"
summary: "SMP security request (from peripheral)\_does not include the maximum\nencryption key size supported. Using a key with less than the maximum keysize\nmakes brute-forcing the key easier. See V6 in BLERP paper linked below."
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-521
published: '2026-08-13'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T19:12:59.557'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-19293'
references:
  - url: 'https://community.silabs.com/068Vm00000x0yyH'
    label: product-security@silabs.com
  - url: >-
      https://docs.silabs.com/rs9116-wiseconnect/latest/wifibt-wc-release-notes/rs9116-ble-release-notes#bug-fixes
    label: product-security@silabs.com
  - url: >-
      https://docs.silabs.com/sisdk-release-notes/latest/sisdk-wifi-release-notes/sisdk-wifible-ble-release-notes
    label: product-security@silabs.com
  - url: >-
      https://www.ndss-symposium.org/ndss-paper/blerp-ble-re-pairing-attacks-and-defenses/
    label: product-security@silabs.com
tags:
  - nvd
epss: 0.00134
epssPercentile: 0.03294
ingestedAt: '2026-09-08T20:10:03.157Z'
---

## Overview

SMP security request (from peripheral) does not include the maximum
encryption key size supported. Using a key with less than the maximum keysize
makes brute-forcing the key easier. See V6 in BLERP paper linked below.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.