CVE-2021-27953 is a NULL pointer dereference vulnerability affecting ecobee3 lite devices running firmware version 4.5.81.200 during the HomeKit Wireless Access Control setup. An unauthenticated attacker can exploit this by sending a crafted HTTP request, leading to a denial of service and device reboot. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over the network with low complexity and no user interaction, resulting in high availability impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
4.5.81.200CPE matchmatch criteria | cpe:2.3:o:ecobee:ecobee3_lite_firmware:4.5.81.200:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.