{"id":"CVE-2026-78861","title":"An issue in Mercusys AC12 V2 allows a local attacker to execute arbitrary code via a hardcoded 512-bit RSA Private Key","summary":"An issue in Mercusys AC12 V2 allows a local attacker to execute arbitrary code via a hardcoded 512-bit RSA Private Key","severity":"high","cvss":7.7,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-789"],"published":"2026-10-05","updated":"2026-10-06","sourceUpdated":"2026-10-06T17:17:26.800","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-78861","references":[{"url":"http://ac12.com","label":"cve@mitre.org"},{"url":"http://mercusys.com","label":"cve@mitre.org"},{"url":"https://threadpoolx.gitbook.io/docs/cve/mercusys-ac12-v2-security-advisory/hardcoded-private-key","label":"cve@mitre.org"},{"url":"https://threadpoolx.gitbook.io/docs/cve/mercusys-ac12-v2-security-advisory/hardcoded-private-key","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00205,"epssPercentile":0.10378,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-10-06T16:12:39.142341Z"},"ingestedAt":"2026-10-05T20:32:56.655Z","slug":"CVE-2026-78861","body":"## Overview\n\nAn issue in Mercusys AC12 V2 allows a local attacker to execute arbitrary code via a hardcoded 512-bit RSA Private Key\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":42.4,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":216600,"id":"CVE-2026-78861","ts":1791306671288,"field":"exploit_available","old":"false","new":"true"},{"seq":216599,"id":"CVE-2026-78861","ts":1791306671288,"field":"cvss","old":null,"new":"7.7"},{"seq":216598,"id":"CVE-2026-78861","ts":1791306671288,"field":"severity","old":"none","new":"high"}]}