CVE-2026-5706

Code execution via malformed extended advertisements

Published Aug 27, 2026 · Updated Aug 27, 2026

Out-of-bounds writes in Silicon Labs Bluetooth Mesh SDK 6.1.4 and earlier allow remote attackers to execute code via malformed advertisements. The extended-advertisement parser accepts inconsistent length information and writes beyond a stack buffer, corrupting stack memory. Exploitation requires a device already joined to the mesh and affects only provisioners that support extended advertisements.

CVSS severity8.9
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds writes in Silicon Labs Bluetooth Mesh SDK 6.1.4 and earlier allow remote attackers to execute code via malformed advertisements. The extended-advertisement parser accepts inconsistent length information and writes beyond a stack buffer, corrupting stack memory. Exploitation requires a device already joined to the mesh and affects only provisioners that support extended advertisements.

The record

CVE
CVE-2026-5706
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Sigma Designs
Product
Bluetooth Mesh SDK
Classifications
CWE-130, T1210
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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=0 <=6.1.4, 9.1.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Sigma Designs · Bluetooth Mesh SDKversion=0 <=6.1.4, 9.1.0

Published CVSS scores

8.9Silicon LabsCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-130Improper Handling of Length Parameter Inconsistency
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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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