Vulnerability · Published Aug 27, 2026 · Assigned by Silabs
CVE-2026-5706Buffer overflow in Bluetooth Mesh SDK when handling extended advertisements
High 8.9
In plain English
A high-severity security flaw in BT Mesh SDK from Silicon Labs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).
Severity (CVSS 4.0)8.9High
Exploit odds (30 days)0.4%top 66.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Silicon Labs | BT Mesh SDK | 0 – through 6.1.4, 9.1.0 |
Weakness: CWE-130 · Vector: 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
References
- https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/a45Vm000000Et6HIAS?operationContext=S1 vendor-advisory, permissions-required
- https://github.com/SiliconLabs/gecko_sdk/releases patch