How severe is CVE-2021-21955?

CVE-2021-21955 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-21955 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21955?

CVE-2021-21955 affects Anker Eufy Homebase 2 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21955?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-21955 published?

CVE-2021-21955 was published on 2021-12-09 and last updated on 2026-06-17.

CVE-2021-21955

CVE-2021-21955 is a high-severity vulnerability in Anker Eufy Homebase 2 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Anker Eufy Homebase 2 Firmware
Published: 2021-12-09
Last modified: 2026-06-17

Description

An authentication bypass vulnerability exists in the get_aes_key_info_by_packetid() function of the home_security binary of Anker Eufy Homebase 2 2.1.6.9h. Generic network sniffing can lead to password recovery. An attacker can sniff network traffic to trigger this vulnerability.

Frequently asked questions

What is CVE-2021-21955?: An authentication bypass vulnerability exists in the get_aes_key_info_by_packetid() function of the home_security binary of Anker Eufy Homebase 2 2.1.6.9h. Generic network sniffing can lead to password recovery. An attacker can sniff network traffic to trigger this vulnerability.
How severe is CVE-2021-21955?: CVE-2021-21955 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-21955 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21955?: CVE-2021-21955 affects Anker Eufy Homebase 2 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21955?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-21955 published?: CVE-2021-21955 was published on 2021-12-09 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1382

Affected products (1)

cpe:2.3:o:anker:eufy_homebase_2_firmware:2.1.6.9h:*:*:*:*:*:*:*

More vulnerabilities in Anker Eufy Homebase 2 Firmware

CVE-2021-21951 — Critical (CVSS 10.0): An out-of-bounds write vulnerability exists in the CMD_DEVICE_GET_SERVER_LIST_REQUEST functionality of the…
CVE-2021-21950 — Critical (CVSS 10.0): An out-of-bounds write vulnerability exists in the CMD_DEVICE_GET_SERVER_LIST_REQUEST functionality of the…
CVE-2021-21940 — Critical (CVSS 10.0): A heap-based buffer overflow vulnerability exists in the pushMuxer processRtspInfo functionality of Anker Eufy Homebase…
CVE-2021-21954 — Critical (CVSS 9.9): A command execution vulnerability exists in the wifi_country_code_update functionality of the home_security binary of…
CVE-2022-29503 — Critical (CVSS 9.8): A memory corruption vulnerability exists in the libpthread linuxthreads functionality of uClibC 0.9.33.2 and uClibC-ng…
CVE-2022-21806 — Critical (CVSS 9.8): A use-after-free vulnerability exists in the mips_collector appsrv_server functionality of Anker Eufy Homebase 2…

All CVEs affecting Anker Eufy Homebase 2 Firmware →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-101077 — Critical (CVSS 10.0): A flaw has been found in Netcore NR289-GE 1.4.5102. This impacts the function process_request of the component boa_temp…
CVE-2026-100886 — Critical (CVSS 10.0): A vulnerability was identified in Seetong T8108, T8108P, T8116 and T8232 4.6.1.4-build202604241011. The affected…
CVE-2026-77244 — Critical (CVSS 10.0): MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0,…
CVE-2026-94493 — Critical (CVSS 10.0): A vulnerability was detected in Gigatech PDV5701 1.0.31_240305_112640. This issue affects some unknown processing of…
CVE-2026-83099 — Critical (CVSS 10.0): Vulnerability in the Oracle Forms product of Oracle Fusion Middleware (component: Forms Services, C/S, Charmode).…
CVE-2026-83059 — Critical (CVSS 10.0): Vulnerability in the Oracle Internet Directory product of Oracle Fusion Middleware (component: OID LDAP Server).…

Browse all CWE-287 (Improper Authentication) vulnerabilities →