What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-09-08
• Weakness: CWE-130

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.

Affected products

• Silicon Labs BT Mesh SDK: through 6.1.4, 9.1.0

References

• https://github.com/SiliconLabs/gecko_sdk/releases
• https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/a45Vm000000Et6HIAS?operationContext=S1

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