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Vulnerability record · CVE-2021-21940 · published 12 October 2021

CVE-2021-21940: Anker eufy homebase 2 firmware heap-based buffer overflow vulnerability

Anker · Eufy Homebase 2 Firmware

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.

10.0 CVSS 3.1 Critical EPSS 1.3% · top 29.9% CWE-122 · Heap-based buffer overflowCWE-787 · Out-of-bounds write
10.0CVSS 3.1 base score, v2 7.5
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1369 ExploitThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1369 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2021-21950Anker eufy homebase 2 firmware memory buffer overflow vulnerabilityAn out-of-bounds write vulnerability exists in the CMD_DEVICE_GET_SERVER_LIST_REQUEST functionality of the home_security binary of Anker Eufy Homebas…EPSS 2.4%10.0CVE-2021-21951Anker eufy homebase 2 firmware memory buffer overflow vulnerabilityAn out-of-bounds write vulnerability exists in the CMD_DEVICE_GET_SERVER_LIST_REQUEST functionality of the home_security binary of Anker Eufy Homebas…EPSS 2.4%9.9CVE-2021-21954Anker eufy homebase 2 firmware os command injection vulnerabilityA command execution vulnerability exists in the wifi_country_code_update functionality of the home_security binary of Anker Eufy Homebase 2 2.1.6.9h.…EPSS 2.4%9.8CVE-2022-29503Uclibc memory buffer overflow vulnerabilityA memory corruption vulnerability exists in the libpthread linuxthreads functionality of uClibC 0.9.33.2 and uClibC-ng 1.0.40. Thread allocation can …EPSS 1.3%9.8CVE-2022-21806Anker eufy homebase 2 firmware use after free vulnerabilityA use-after-free vulnerability exists in the mips_collector appsrv_server functionality of Anker Eufy Homebase 2 2.1.8.5h. A specially-crafted set of…EPSS 2.3%9.8CVE-2021-21952Anker eufy homebase 2 firmware authentication bypass via alternate path vulnerabilityAn authentication bypass vulnerability exists in the CMD_DEVICE_GET_RSA_KEY_REQUEST functionality of the home_security binary of Anker Eufy Homebase …EPSS 1.3%9.0CVE-2021-21941Anker eufy homebase 2 firmware use after free vulnerabilityA use-after-free vulnerability exists in the pushMuxer CreatePushThread functionality of Anker Eufy Homebase 2 2.1.6.9h. A specially-crafted set of n…EPSS 1.7%8.8CVE-2022-25989Anker eufy homebase 2 firmware authentication bypass by spoofing vulnerabilityAn authentication bypass vulnerability exists in the libxm_av.so getpeermac() functionality of Anker Eufy Homebase 2 2.1.8.5h. A specially-crafted DH…EPSS 1.0%

Source: NIST National Vulnerability Database (record CVE-2021-21940), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.