What is CVE-2021-27953?

CVE-2021-27953 is a high-severity vulnerability in Ecobee Ecobee3 Lite, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-08-03.

How severe is CVE-2021-27953?

High severity. CVSS v3 base score is 7.5 out of 10.

NULL pointer dereference in Ecobee Ecobee3 Lite

CVE-2021-27953

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.

EPSS: 0.017 (74.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Ecobee Ecobee3_lite
Ecobee Ecobee3_lite_firmware — versions 4.5.81.200
N/a — versions n/a

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-27953?: CVE-2021-27953 is a high-severity vulnerability in Ecobee Ecobee3 Lite, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-08-03.
How severe is CVE-2021-27953?: High severity. CVSS v3 base score is 7.5 out of 10.