CVE-2026-47147: CWE-125: Out-of-bounds Read in Silicon Labs EmberZNet
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.
AI Analysis
Technical Summary
In EmberZNet versions up to and including 9.0.2, the OTA server parser is vulnerable to an out-of-bounds read (CWE-125) when processing malformed OTA requests. This vulnerability permits an attacker device, which must be a member of the network and support the OTA Server cluster, to read a limited amount of RAM data. The vulnerability has a CVSS 4.0 base score of 7.1, indicating high severity. There is no vendor advisory or patch information currently available, and no known exploits in the wild have been reported.
Potential Impact
An attacker device that has already joined the network and supports the OTA Server cluster can exploit this vulnerability to read a limited portion of RAM data from the OTA server. This could lead to unauthorized disclosure of sensitive information stored in memory. The impact is limited by the requirement that the attacker be a network member and support the OTA Server cluster, and by the limited size and location of the data that can be read.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch or official fix is available, restrict network access to trusted devices only and monitor for unusual OTA request activity from devices within the network that support the OTA Server cluster.
CVE-2026-47147: CWE-125: Out-of-bounds Read in Silicon Labs EmberZNet
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 v4.0
Score 7.1high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
In EmberZNet versions up to and including 9.0.2, the OTA server parser is vulnerable to an out-of-bounds read (CWE-125) when processing malformed OTA requests. This vulnerability permits an attacker device, which must be a member of the network and support the OTA Server cluster, to read a limited amount of RAM data. The vulnerability has a CVSS 4.0 base score of 7.1, indicating high severity. There is no vendor advisory or patch information currently available, and no known exploits in the wild have been reported.
Potential Impact
An attacker device that has already joined the network and supports the OTA Server cluster can exploit this vulnerability to read a limited portion of RAM data from the OTA server. This could lead to unauthorized disclosure of sensitive information stored in memory. The impact is limited by the requirement that the attacker be a network member and support the OTA Server cluster, and by the limited size and location of the data that can be read.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch or official fix is available, restrict network access to trusted devices only and monitor for unusual OTA request activity from devices within the network that support the OTA Server cluster.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Silabs
- Date Reserved
- 2026-05-18T20:02:03.669Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3d38364853345fc10a3558
Added to database: 06/25/2026, 14:16:22 UTC
Last enriched: 06/25/2026, 14:46:48 UTC
Last updated: 08/09/2026, 12:41:11 UTC
Views: 69
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