CVE-2020-27890: Ti Z-Stack

High severity, CVSS 8.2. EPSS: 1% chance of exploitation in the next 30 days.

The Zigbee protocol implementation on Texas Instruments CC2538 devices with Z-Stack 3.0.1 does not properly process a ZCL Write Attributes No Response message. It crashes in zclParseInWriteCmd() and does not update the specific attribute's value.

Affected products

• Ti Z-Stack: version 3.0.1 only

Published 2020-10-27. Last modified 2026-06-17.