CVE-2026-19292 PUBLISHED

Bluetooth re-pairing with legitimate device can use lower security level

Assigner: Silabs
Reserved: 07.08.2026 Published: 13.08.2026 Updated: 13.08.2026

Re-pairing with a legitimate device can use a lower security level than previous making brute-forcing the LTK easier. See V4 in the BLERP paper linked below.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.8

Attack Vector	Adjacent Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	silabs.com
Product	WiseConnect
Versions	Default: unaffected affected from 4.0.0 to 4.1.0 (excl.) affected from 2.0.0 to 2.14.0 (excl.)

References

https://docs.silabs.com/sisdk-release-notes/latest/sisdk-wifi-release-notes/sisdk-wifible-ble-release-notes
https://docs.silabs.com/rs9116-wiseconnect/latest/wifibt-wc-release-notes/rs9116-ble-release-notes#bug-fixes
https://community.silabs.com/068Vm00000x0yyH
https://www.ndss-symposium.org/ndss-paper/blerp-ble-re-pairing-attacks-and-defenses/

Problem Types

CWE-305 Authentication bypass by primary weakness CWE

Impacts

CAPEC-180 Exploiting Incorrectly Configured Access Control Security Levels