CVE-2026-18145

{
  "etk_id": "ETK-2026-45",
  "cve_id": "CVE-2026-18145",
  "display_id": "CVE-2026-18145",
  "ghsa_id": "GHSA-6g2x-6j83-r28p",
  "euvd_id": "EUVD-2026-89500",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Stack buffer overflow in Fireware OS spamBlocker",
  "summary": "WatchGuard Fireware OS spamBlocker (spamd) contains a stack-based buffer overflow. An authenticated administrator may use a malicious management request to disrupt the service or potentially run code; administrator-level access is required.",
  "mitigation": "Update Fireware OS to 2026.3.2, 2026.2.3, 12.12.3, or 12.5.21, as appropriate for the deployed release branch. Restrict management access to trusted administrators until updates are installed.",
  "vendor": "WatchGuard",
  "product": "Fireware OS",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 2026.3, < 2026.3.2",
        ">= 2025.0, < 2026.2.3",
        ">= 12.0, < 12.12.3"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "2026.3.2",
        "2026.2.3",
        "12.12.3"
      ],
      "package_name": "Fireware OS",
      "purl": null
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 12.0, < 12.5.21"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "12.5.21"
      ],
      "package_name": "Fireware OS",
      "purl": null
    }
  ],
  "cwes": [
    121
  ],
  "cvss_score": 8.6,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
  "epss_score": 0.0039,
  "epss_percentile": 0.3159,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 46.23666633333333,
  "t0_at": "2026-09-29T23:05:47.947000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-09-29T23:05:47.947000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-29T23:05:47.947000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-18145"
    }
  }
}