Vulnerability · Published Oct 22, 2026 · Assigned by Silabs
CVE-2026-66281Authenticated Denial-of-Service in Zigbee Discover Attributes Handling
Medium 6.0
In plain English
A medium-severity infinite loop in EmberZNet from Silicon Labs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Severity (CVSS 4.0)6.0Medium
Exploit odds (30 days)0.3%top 73.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Silicon Labs | EmberZNet | 0 – through 9.1.1 |
Weakness: CWE-835 · Vector: 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