Vulnerability · Published Jun 25, 2026 · Assigned by Silabs

CVE-2026-47147OTA server raw parser missing per-field bounds validation in EmberZNet v9.0.2

High 7.1

In plain English

A high-severity out-of-bounds read in EmberZNet 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 35% of all known vulnerabilities).

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.4%top 65.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

In EmberZNet v9.0.2 and earlier, malformed OTA requests can drive the OTA server parser into out-of-bounds reads. A limited amount of data from RAM is read back to the requester. The size and location of this data is limited. These requests must come from a device that has already joined the network. Only devices supporting the OTA Server cluster may be impacted.

Affected products (as reported)

Vendor	Product	Versions
Silicon Labs	EmberZNet	0 – through 9.0.2

Weakness: CWE-125 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

References

https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/069Vm00000pEGPQIA4?operationContext=S1 vendor-advisory, permissions-required
https://github.com/SiliconLabsSoftware/sisdk-release/ patch