CVE-2026-4526 PUBLISHED

Global ZCL command parser missing minimum-length validation in EmberZNet v9.0.2

Assigner: Silabs
Reserved: 20.03.2026 Published: 25.06.2026 Updated: 25.06.2026

In EmberZNet v9.0.2 and earlier, malformed global ZCL messages can trigger out-of-bounds reads in framework parsing logic and terminate the process. These messages must come from a device that has already joined the network, and no information leakage back to the sender was observed.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS Score: 7.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	Silicon Labs
Product	EmberZNet
Versions	Default: unaffected affected from 0 to 9.0.2 (incl.)

Credits

Junming C. (@Chapoly1305) and Prof. Qiang Zeng of George Mason University finder

References

Problem Types

CWE-125: Out-of-bounds Read, CWE-130: Improper Handling of Length Parameter Inconsistency CWE

Impacts

CAPEC-153: Input Data Manipulation