CVE-2026-86104

{
  "etk_id": "ETK-2026-43",
  "cve_id": "CVE-2026-86104",
  "display_id": "CVE-2026-86104",
  "ghsa_id": "GHSA-44q2-m4gj-p5w4",
  "euvd_id": "EUVD-2026-89501",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Unauthenticated resource exhaustion in Fireware OS login process",
  "summary": "WatchGuard Fireware OS contains an uncontrolled resource-consumption issue in its wgagent login process. A remote attacker without authentication can cause denial of service by sending a crafted request to the affected service.",
  "mitigation": "Upgrade Fireware OS to 2026.3.2, 2026.2.3, 12.12.3, or 12.5.21, as applicable to the appliance and release train.",
  "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": [
    400
  ],
  "cvss_score": 8.7,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
  "epss_score": 0.0036,
  "epss_percentile": 0.2856,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 106.40332095,
  "t0_at": "2026-09-29T23:05:48.197000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-17T02:55:27.821479+00:00",
      "days": 17.15948639443287,
      "is_lower_bound": false,
      "measured_at": "2026-09-29T23:05:48.197000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-09-29T23:05:48.197000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-29T23:05:48.197000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-86104"
    }
  }
}