CVE-2026-19292Public exploit

BLE impersonation via re-pairing key-size downgrade

Published Aug 13, 2026 · Updated Aug 13, 2026

Authentication downgrade in WiSeConnect SDK 2.0.0 through 2.13.1 and 4.0.0 through 4.0.3 allows physically proximate attackers to weaken BLE keys. The BLE re-pairing path accepts a lower security level than the existing bond because it does not enforce a minimum SMP encryption key size. Without credentials, physically proximate attackers can force re-pairing, brute-force the shortened LTK, and impersonate a paired device or intercept its traffic.

CVSS severity8.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication downgrade in WiSeConnect SDK 2.0.0 through 2.13.1 and 4.0.0 through 4.0.3 allows physically proximate attackers to weaken BLE keys. The BLE re-pairing path accepts a lower security level than the existing bond because it does not enforce a minimum SMP encryption key size. Without credentials, physically proximate attackers can force re-pairing, brute-force the shortened LTK, and impersonate a paired device or intercept its traffic.

The record

CVE
CVE-2026-19292
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
Sigma Designs
Product
WiSeConnect SDK
Classifications
CWE-305, CAPEC-180, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.0 <2.14.0
  2. Affected versionversion=4.0.0 <4.1.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Sigma Designs · WiSeConnect SDKversion=2.0.0 <2.14.0; version=4.0.0 <4.1.0

Published CVSS scores

8.8Silicon LabsCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-305Authentication Bypass by Primary Weakness
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
T1557Adversary-in-the-Middle

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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