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CVE-2026-5706— Buffer overflow in Bluetooth Mesh SDK when handling extended advertisements

Quick assessment

Affected
Silicon Labs BT Mesh SDK
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在蓝牙 Mesh SDK 6.1.4 及更早版本中，格式错误的扩展广播可能触发越界写入，从而导致堆栈破坏和远程代码执行。这些消息必须来自网络中已加入的设备。只有支持扩展广播的配网器可能受到影响。

CVSS 8.9 · High EPSS 0.27% · P18

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Silicon Labs BT Mesh SDK ≤ 6.1.4, 9.1.0 affected
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I. Basic Information for CVE-2026-5706

Vulnerability Information
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Vulnerability Title
Buffer overflow in Bluetooth Mesh SDK when handling extended advertisements
Source: CVE Program / CVE List V5
Vulnerability Description
In Bluetooth Mesh SDK 6.1.4 and earlier, malformed extended advertisements can trigger out-of-bounds writes leading to stack corruption and remote code execution. These messages must come from a device that has already joined the network. Only provisioners supporting extended advertisements may be impacted.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
长度参数不一致性处理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Silicon Labs BT Mesh SDK 0 ~ 6.1.4, 9.1.0 -

II. Public POCs for CVE-2026-5706

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-5706

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Vendor Pages for CVE-2026-5706 (1)

IV. Related Vulnerabilities

Same vendor: Silicon Labs
Same weakness: CWE-130

V. Comments for CVE-2026-5706

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