CVE-2026-103903

{
  "etk_id": "ETK-2026-1345",
  "cve_id": "CVE-2026-103903",
  "display_id": "CVE-2026-103903",
  "ghsa_id": "GHSA-23wm-v672-9cvc",
  "euvd_id": "EUVD-2026-97325",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Authorization bypass in MikroTik RouterOS WinBox",
  "summary": "MikroTik RouterOS WinBox authentication can assign the permissions of a different existing account to a logged-in low-privilege user. An attacker needs valid credentials for an account allowed to use WinBox and could obtain administrative access if a higher-privilege account exists.",
  "mitigation": "Upgrade MikroTik RouterOS to version 7.24.5. Until upgrades are complete, restrict WinBox access and disable it for accounts that do not require it.",
  "vendor": "MikroTik",
  "product": "RouterOS",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 7.0.0, < 7.24.5"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "7.24.5"
      ],
      "package_name": "RouterOS",
      "purl": null
    }
  ],
  "cwes": [
    863
  ],
  "cvss_score": 8.7,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
  "epss_score": 0.0042,
  "epss_percentile": 0.3442,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 19.960197566666668,
  "t0_at": "2026-10-12T10:37:23.578000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-12T10:37:23.578000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-12T10:37:23.578000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-103903"
    }
  }
}