CVE-2021-21940

Name: CVE-2021-21940
Creator: NVD / NIST
Published: 2021-10-12T14:15:08.17+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 10/10EPSS 1.29%

Last modified Jun 17, 2026

CVE-2021-21940 is a critical-severity vulnerability rated 10/10 on the CVSS scale. A heap-based buffer overflow vulnerability exists in the pushMuxer processRtspInfo functionality of Anker Eufy Homebase 2 2.1.6.9h. A specially-crafted network packet can lead to a heap buffer overflow. EPSS estimates a 1.29% chance of exploitation in the next 30 days.

Description

A heap-based buffer overflow vulnerability exists in the pushMuxer processRtspInfo functionality of Anker Eufy Homebase 2 2.1.6.9h. A specially-crafted network packet can lead to a heap buffer overflow. An attacker can send a malicious packet to trigger this vulnerability.

Metrics

CVSS 3.1

10/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Probability

1.29%

66.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Anker	Eufy Homebase 2 Firmware	2.1.6.9h

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1369Exploit, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1369Exploit, Third Party Advisory

Timeline

Published: Oct 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21940?

How severe is CVE-2021-21940?

CVE-2021-21940 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 1.29% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21940?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21940?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST