CVE-2021-27953
HIGHecobee3 lite firmware 4.5.81.200 - Denial of Service via HomeKit Wireless Access Control Setup
Title source: llmDescription
A NULL pointer dereference vulnerability exists on the ecobee3 lite 4.5.81.200 device in the HomeKit Wireless Access Control setup process. A threat actor can exploit this vulnerability to cause a denial of service, forcing the device to reboot via a crafted HTTP request.
References (1)
Core 1
Core References
Exploit, Third Party Advisory x_refsource_misc
https://www.l9group.com/advisories/remote-denial-of-service-of-ecobee3-lite
Scores
CVSS v3
7.5
EPSS
0.0167
EPSS Percentile
73.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-476
Status
published
Products (1)
ecobee/ecobee3_lite_firmware
4.5.81.200
Published
Aug 03, 2021
Tracked Since
Feb 18, 2026