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CVE-2026-66281

Authenticated Denial-of-Service in Zigbee Discover Attributes Handling

MEDIUM

6

CVSS Score

Published: October 22, 2026 at 01:43 PM UTC

Updated: October 23, 2026 at 12:18 PM UTC

1 product affected across 1 vendorEmberZNet

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Severity

MEDIUM6

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

EmberZNet · Silicon

90%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

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

References (1)

Vendor Advisory

Source: cverecord

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6MEDIUMSilabs

Vector?

Quick Info

StatusUNDERGOING ANALYSIS

CWE

CWE-835

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