CVE-2026-66281Authenticated Denial-of-Service in Zigbee Discover Attributes Handling

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.

6.0 MEDIUMEPSS 0.33%Not in KEVNVD: Analyzed

Last updated: 2026-10-29 13:09 UTC

OverviewCVSS details

6.0MEDIUMCVSS 4.0

Score source: Silabs (CNA)
NVD status: Analyzed
Published: Oct 22, 2026
Assigner: Silabs

Affected

EmberZNet (Silicon Labs)

Versions: through 9.1.1

Exploitation

Public exploit: None listed
CISA KEV: Not listed
KEV due date: —
SSVC: Exploitation none · Automatable no · Impact partial

EPSS · FIRST, scored Nov 7

0.33%chance of exploitation in 30 days

Higher than 26.47% of CVEs

CVSS 4.0 · Silabs (CNA)

6.0Medium

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

Attack vector: Network
Attack complexity: Low
Attack requirements: Present
Privileges required: Low
User interaction: None
Confidentiality impact: None
Integrity impact: None
Availability impact: High
Confidentiality (other systems): None
Integrity (other systems): None
Availability (other systems): None

CVSS 3.1 · NVD

7.5High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
6.0	MEDIUM	4.0Silabs (CNA)	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5	HIGH	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CVE ID: CVE-2026-66281
Status: Analyzed
Assigner (CNA): Silabs
Published: Oct 22, 2026
Last modified: 2026-10-29 13:09 UTC
Weaknesses: CWE-835 · Loop with unreachable exit condition ('infinite loop')

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 08:56 UTC.