{"id":"CVE-2026-121818","aliases":[],"cve":{"records":[{"id":"CVE-2026-121818","source":"twcert","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-04T05:40:25.201Z","published":"2026-11-04T06:26:53.550Z","modified":"2026-11-04T20:00:58.496Z"}],"publishers":[{"name":"twcert","role":"CNA","organizationId":"cded6c7f-6ce5-4948-8f87-aa7a3bbb6b0e","modified":"2026-11-04T06:56:13.525Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-04T20:00:58.496Z"}],"references":[{"url":"https://www.twcert.org.tw/en/cp-139-11362-1e829-2.html","tags":["third-party-advisory"],"source":"twcert"},{"url":"https://www.twcert.org.tw/tw/cp-132-11360-ab123-1.html","tags":["third-party-advisory"],"source":"twcert"}],"weaknesses":[{"id":"CWE-1394","description":"CWE-1394 Use of Default Cryptographic Key","source":"twcert"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-04T18:28:13.244033Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"About Time Technologies｜Herowatch Go - Security Misconfiguration","titleSource":"twcert","descriptionSource":"twcert","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code.","score":8.5,"severity":"high","published":"2026-11-04T06:26:53.550Z","modified":"2026-11-04T20:00:58.496Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"About Time Technologies","name":"Herowatch Go","platforms":[],"versions":[{"version":"all","status":"affected","versionType":"custom"}],"defaultStatus":"unaffected","cpes":[],"source":"twcert","url":"https://www.cve.org/CVERecord?id=CVE-2026-121818"}],"remediation":[{"text":"The product is no longer maintained. Users are advised to replace it with a supported device.","source":"twcert","url":"https://www.cve.org/CVERecord?id=CVE-2026-121818"}],"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"],"sources":[{"name":"CVE","id":"CVE-2026-121818","modified":"2026-11-04T20:00:58.496Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-121818"}],"assessments":[{"source":"twcert","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","score":8.5},{"source":"twcert","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8}],"sourceAffected":[],"observedAt":"2026-11-04T20:50:53.528Z","kev":{"status":"not-listed","checkedAt":"2026-11-08T03:30:31.657Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-11-04T06:45:30.977Z","attemptedAt":"2026-11-04T06:45:30.977Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-04T06:45:31.509Z","attemptedAt":"2026-11-04T06:45:31.509Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-11-04T06:45:31.330Z","attemptedAt":"2026-11-04T06:45:31.330Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-04T06:45:31.330Z","attemptedAt":"2026-11-04T06:45:31.330Z"}],"evidence":[],"aiSummary":{"text":"Herowatch Go by About Time Technologies has a security misconfiguration vulnerability, allowing authenticated local attackers to sign malicious programs using a publicly available test key, potentially elevating privileges. The vulnerability affects all versions. The product is no longer maintained.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-04T07:06:04.932Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-121818"}]}}