CVE-2026-66281

In EmberZNet 9.1.1 and earlier, a malformed Discover Attributes command can result in a loop with…

Risk score: 40/100
CVSS: 6.0 v4.0
Exploit chance (30 days): 0.3%
Published: 22 Oct 2026

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What to know

What it is: In EmberZNet 9.1.1 and earlier, a malformed Discover Attributes command can result in a loop with unreachable exit condition (infinite loop). These messages must come from a device that has already joined the network. Only devices supporting manufacturer-specific clusters are impacted.
Affected: See advisory
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Why it is Yellow

CVSS 6.0 medium

References

https://github.com/SiliconLabsSoftware/docs-security-advisories/blob/main/Advisories/500-599/A-00000590.md

Original description

In EmberZNet 9.1.1 and earlier, a malformed Discover Attributes command can result in a loop with unreachable exit condition (infinite loop). These messages must come from a device that has already joined the network. Only devices supporting manufacturer-specific clusters are impacted.

Last activity 22 Oct 2026. Patch Forecast updates every hour.