High severity · published Jun 25, 2026
CVE-2026-47147
OTA server raw parser missing per-field bounds validation in EmberZNet v9.0.2
7.1
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EM
EmberZNet · Silicon Labs
through 9.0.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47147
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-47147
Not Applicable
https://github.com/SiliconLabsSoftware/sisdk-release/
Permissions Required
https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/069Vm00000pEGPQIA4?operationContext=S1
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