CVE-2026-121818

Herowatch Mini developed by About Time Technologies has a system signing vulnerability

Risk score: 47/100
CVSS: 7.8 v3.1
Published: 4 Nov 2026

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What to know

What it is: Herowatch Mini developed by About Time Technologies has a system signing vulnerability. Authenticated local attackers can exploit a publicly available test key to sign malicious programs, allowing them to elevate privileges and execute arbitrary code.
Affected: See advisory
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Why it is Yellow

CVSS 7.8 high

References

https://www.twcert.org.tw/en/cp-139-11362-1e829-2.html
https://www.twcert.org.tw/tw/cp-132-11360-ab123-1.html

Original description

Herowatch Mini developed by About Time Technologies has a system signing vulnerability. Authenticated local attackers can exploit a publicly available test key to sign malicious programs, allowing them to elevate privileges and execute arbitrary code.

Last activity 4 Nov 2026. Patch Forecast updates every hour.