CVE-2021-21952Public exploitNetwork attack vector

Owner-equivalent access via predictable key exchange

Published Dec 22, 2021 · Updated Aug 3, 2024

Authentication bypass in Anker Innovations eufy HomeBase 2 2.1.6.9h allows remote attackers to gain owner-app privileges via UDP packets. The home_security handler accepts unauthenticated opcode 0x0d, decrypts an attacker-supplied RSA key with a predictable AES key, and encrypts the device session key to that RSA key. Network reachability to the UDP service is sufficient; the exchange replaces the authentication key and enables owner-equivalent commands.

CVSS severity9.8
Critical
EPSS probability1.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Anker Innovations eufy HomeBase 2 2.1.6.9h allows remote attackers to gain owner-app privileges via UDP packets. The home_security handler accepts unauthenticated opcode 0x0d, decrypts an attacker-supplied RSA key with a predictable AES key, and encrypts the device session key to that RSA key. Network reachability to the UDP service is sufficient; the exchange replaces the authentication key and enables owner-equivalent commands.

The record

CVE
CVE-2021-21952
Published
Dec 22, 2021
Updated
Aug 3, 2024
Vendor
Anker Innovations
Product
eufy HomeBase 2
Classifications
CWE-288, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Anker Eufy Homebase 2 2.1.6.9h

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Anker Innovations · eufy HomeBase 2version=Anker Eufy Homebase 2 2.1.6.9h

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.4Cisco TalosCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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