What is CVE-2021-21951?

CVE-2021-21951 is a critical-severity vulnerability in Anker Eufy Homebase 2, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 10.0/10. Published 2021-12-08.

How severe is CVE-2021-21951?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Buffer overflow in Anker Eufy Homebase 2

CVE-2021-21951

An out-of-bounds write vulnerability exists in the CMD_DEVICE_GET_SERVER_LIST_REQUEST functionality of the home_security binary of Anker Eufy Homebase 2 2.1.6.9h in function read_udp_push_config_file. A specially-crafted network packet can lead to code execution.

Vulnerability class: Buffer Overflow

Published 2021-12-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.024 (83.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

Anker Eufy Homebase 2
Anker Eufy Homebase 2 Firmware — versions 2.1.6.9h
Anker — versions Anker Eufy Homebase 2 2.1.6.9h

Weakness classification (CWE)

References

talosintelligence.com/vulnerability_reports/TALOS-2021-1378 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-21951?: CVE-2021-21951 is a critical-severity vulnerability in Anker Eufy Homebase 2, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 10.0/10. Published 2021-12-08.
How severe is CVE-2021-21951?: Critical severity. CVSS v3 base score is 10.0 out of 10.