{"id":"CVE-2026-121818","aliases":["EUVD-2026-116762","GHSA-54r8-946x-g5g5"],"status":"published","title":"About Time Technologies｜Herowatch Go - Security Misconfiguration","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.","severity":{"version":"4.0","score":8.5,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00129,"percentile":0.02548,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1394"],"published":"2026-11-04T06:26:53Z","modified":"2026-11-04T09:32:14Z","products":[{"vendor":"about time technologies","product":"herowatch go"}],"references":[{"url":"https://www.twcert.org.tw/en/cp-139-11362-1e829-2.html","tags":["third-party-advisory"]},{"url":"https://www.twcert.org.tw/tw/cp-132-11360-ab123-1.html","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121818"},{"url":"https://github.com/advisories/GHSA-54r8-946x-g5g5"}],"sources":{"cve":[{"id":"CVE-2026-121818","title":"About Time Technologies｜Herowatch Go - Security Misconfiguration","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.","status":"published","published":"2026-11-04T06:26:53.55Z","modified":"2026-11-04T20:00:58.496Z","cvss":[{"version":"4.0","score":8.5,"vector":"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","level":"high","assessor":"cna"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-1394"],"updated_at":"2026-11-04T21:42:22.271694Z"}],"euvd":[{"id":"EUVD-2026-116762","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.","status":"published","published":"2026-11-04T06:26:53Z","modified":"2026-11-04T20:00:58Z","cvss":[{"version":"4.0","score":8.5,"vector":"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","level":"high"}],"updated_at":"2026-11-04T21:45:44.368355Z"}],"ghsa":[{"id":"GHSA-54r8-946x-g5g5","title":"Herowatch Mini developed by About Time Technologies has a system signing vulnerability....","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.","status":"published","published":"2026-11-04T09:32:13Z","modified":"2026-11-04T09:32:14Z","cvss":[{"version":"4.0","score":8.5,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-1394"],"updated_at":"2026-11-04T10:01:04.949269Z"}],"nvd":[{"id":"CVE-2026-121818","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.","status":"published","published":"2026-11-04T07:17:12.35Z","modified":"2026-11-04T20:19:11.3Z","cvss":[{"version":"4.0","score":8.5,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-1394"],"updated_at":"2026-11-04T21:42:34.71458Z"}]}}