Is there a public exploit for CVE-2026-121816?

No public exploit for CVE-2026-121816 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-121816?

CVE-2026-121816 scores CVSS 8.7 (v4.0), rated high.

What does CVE-2026-121816 affect?

CVE-2026-121816 affects About Time Technologies Herowatch Mini.

8.7 High

Herowatch Mini developed by About Time Technologies has a Missing Authentication vulnerability.

CVE-2026-121816

Herowatch Mini developed by About Time Technologies has a Missing Authentication vulnerability. Unauthenticated remote attackers can connect to the affected device's ADB service and obtain an ADB shell, thereby accessing device resources or performing related operations.

Assessment

CVSS: 8.7 (v4.0)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 4 November 2026
Last updated: 4 November 2026
Affected: About Time Technologies · Herowatch Mini
Assigner: twcert

CVSS vectorCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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