CVE-2026-78861

{
  "etk_id": "ETK-2026-723",
  "cve_id": "CVE-2026-78861",
  "display_id": "CVE-2026-78861",
  "ghsa_id": "GHSA-4jgr-x73g-p576",
  "euvd_id": "EUVD-2026-92785",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Hardcoded RSA private key in Mercusys AC12 V2",
  "summary": "Mercusys AC12 V2 contains a hardcoded 512-bit RSA private key. An attacker with local access may be able to execute code on the device.",
  "mitigation": "Restrict local access to the router to trusted administrators and place it on a controlled network segment. Monitor Mercusys for updated firmware and apply a vendor-provided fix when available.",
  "vendor": "Mercusys",
  "product": "Mercusys AC12 V2",
  "affected": [
    {
      "affected_notes": [
        "n/a"
      ],
      "affected_ranges": [],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "n/a",
      "purl": null
    }
  ],
  "cwes": [
    789
  ],
  "cvss_score": 7.7,
  "cvss_src": "nvd",
  "cvss_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
  "epss_score": 0.0014,
  "epss_percentile": 0.0273,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": true,
  "pipeline_minutes": 16.3411213,
  "t0_at": "2026-10-05T00:00:00+00:00",
  "signals": {
    "check": {
      "at": "2026-10-06T05:08:11.824139+00:00",
      "days": 1.214025742349537,
      "is_lower_bound": false,
      "measured_at": "2026-10-05T00:00:00+00:00",
      "url": null
    },
    "exploit": {
      "at": "2026-10-06T05:08:11.824139+00:00",
      "days": 1.214025742349537,
      "is_lower_bound": false,
      "measured_at": "2026-10-05T00:00:00+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-05T00:00:00+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-05T00:00:00+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-78861"
    }
  }
}