Out-of-bounds Read in Silabs Emberznet
CVE-2026-47147
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (32.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Silabs Emberznet
- Silicon Labs Emberznet — versions 0
Weakness classification (CWE)
References
- siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/069Vm000… (Permissions Required, vendor-advisory, permissions-required)
- github.com/SiliconLabsSoftware/sisdk-release/ (patch, Not Applicable)
Frequently asked questions
- What is CVE-2026-47147?
- CVE-2026-47147 is a high-severity vulnerability in Silabs Emberznet, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-06-25.
- How severe is CVE-2026-47147?
- High severity. CVSS v3 base score is 7.1 out of 10.