High severity8.2NVD Advisory· Published Aug 3, 2021· Updated Jun 17, 2026
CVE-2021-27954
CVE-2021-27954
Description
A heap-based buffer overflow vulnerability exists on the ecobee3 lite 4.5.81.200 device in the HKProcessConfig function of the HomeKit Wireless Access Control setup process. A threat actor can exploit this vulnerability to force the device to connect to a SSID or cause a denial of service.
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Affected products
2- ecobee3 lite/ecobee3 litedescription
Patches
Vulnerability mechanics
References
1- www.l9group.com/advisories/ecobee3-lite-heap-overflownvdExploitThird Party Advisory
News mentions
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