What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-22 · updated 2026-10-29
• Weakness: CWE-835

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

• Silicon Labs EmberZNet: through 9.1.1
• Silicon Labs EmberZNet: through 9.1.1

References

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

Get alerted when CVE-2026-66281 or the next vulnerability affects your stack