cve.bz

CVE-2026-121818

8.5 high

High (8.5).

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.

Severity

CVSS 4.0

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

CVSS 3.1

7.8 high
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-1394 Use of Default Cryptographic Key
Published
Record from
the NVD, synced

Ask an AI about this CVE

Show the promptExplain CVE-2026-121818 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-121818?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-121818?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-121818 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.

Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.

Versions

From the CNA's record in the CVE List.

ProductAffected
About Time Technologies Herowatch Goall

References

Check your stackJSON