CVE-2020-27890

HIGH 8.2CVE-2020-27890 · Published 27/10/2020 · updated 17/06/2026

In short

CVE-2020-27890 is a HIGH (CVSS 8.2) vulnerability affecting z-stack (ti).
Chance of exploitation in the next 30 days (EPSS): 0.97%, higher than 61.7% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
z-stack ti	`= 3.0.1`	No fix yet

Description

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.

References

zigbeeprotocol/Z-Fuzzer · Third Party Advisory
ti.com/tool/Z-STACK · Product

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