CVE-2021-21953
Published: 22 December 2021
Summary
CVE-2021-21953 is a high-severity Channel Accessible by Non-Endpoint (CWE-300) vulnerability in Anker Eufy Homebase 2 Firmware. Its CVSS base score is 8.1 (High).
Operationally, ranked in the top 45.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-9124
Vulnerability details
An authentication bypass vulnerability exists in the process_msg() function of the home_security binary of Anker Eufy Homebase 2 2.1.6.9h. A specially-crafted man-in-the-middle attack can lead to increased privileges.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Ensures only authenticated endpoints can access the communication channel, blocking unauthorized non-endpoint access.
Physically restricts transmission channels so they cannot be accessed or tapped by non-endpoint actors within facilities.
Periodic TSCM surveys identify unauthorized access points or taps that make communication channels reachable by non-endpoint adversaries.
Explicitly isolates the communications path so it cannot be accessed or intercepted by non-endpoint entities during security functions.
Restrictions and channel controls reduce the chance that VoIP media or signaling streams remain accessible to non-participants.
Directly prevents non-endpoint access or interception of the session communication path.
An out-of-band channel is inaccessible to non-endpoints that can observe or interfere with the primary communication channel.
The control restricts an inherently broadcast wireless channel to only intended endpoints, mitigating accessibility by non-endpoints.