Medium severity · published Oct 22, 2026
CVE-2026-66281
Authenticated Denial-of-Service in Zigbee Discover Attributes Handling
New
6.0
CVSS
0.3%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EM
EmberZNet · Silicon Labs
through 9.1.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66281
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66281
github.com
https://github.com/SiliconLabsSoftware/docs-security-advisories/blob/main/Advisories/500-599/A-00000590.md
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