{"id":"CVE-2026-78862","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-78862","generatedAt":"2026-10-28T01:02:38.626Z","title":"An issue in Mercusys AC12 V2 allows a local attacker to execute arbitrary code via the UART serial interface on the printed circuit board (PCB)","description":"An issue in Mercusys AC12 V2 allows a local attacker to execute arbitrary code via the UART serial interface on the printed circuit board (PCB)","published":"2026-10-05T20:17:28.000Z","lastModified":"2026-10-06T18:16:57.000Z","status":"Deferred","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":6.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-1299"],"affected":[],"epss":{"score":0.00261,"percentile":0.17658,"date":"2026-10-26","history":[{"date":"2026-10-06","score":0.00159,"percentile":0.04396}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-06T19:30:04.000Z","detail":{"from":null,"score":"6.8","severity":"MEDIUM","fromSeverity":null},"summary":"Now scored CVSS 6.8 MEDIUM."},{"kind":"new","label":"New CVE","at":"2026-10-05T20:17:28.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-05T20:17:27.570Z"},"summary":"New CVE, medium severity (CVSS 6.8)."}],"references":[{"url":"http://ac12.com","source":"cve@mitre.org"},{"url":"http://mercusys.com","source":"cve@mitre.org"},{"url":"https://threadpoolx.gitbook.io/docs/cve/mercusys-ac12-v2-security-advisory/unprotected-physical-debug-interface-uart","source":"cve@mitre.org"},{"url":"https://threadpoolx.gitbook.io/docs/cve/mercusys-ac12-v2-security-advisory/unprotected-physical-debug-interface-uart","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-78862","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}