CVE-2026-49868

{
  "etk_id": "ETK-2026-1796",
  "cve_id": "CVE-2026-49868",
  "display_id": "CVE-2026-49868",
  "ghsa_id": "GHSA-p3fx-9qcg-jmcf",
  "euvd_id": "EUVD-2026-102947",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Out-of-bounds read in RIOT DHCPv6 client",
  "summary": "RIOT versions before 2026.07 mishandle certain DHCPv6 reply option lengths in the DHCPv6 client. A malicious or compromised DHCPv6 server can cause affected devices to crash and may be able to expose or corrupt memory when IA_PD support is enabled.",
  "mitigation": "Upgrade RIOT to version 2026.07 or later. Where an immediate upgrade is not possible, disable the affected DHCPv6 IA_PD client functionality and restrict access to trusted DHCPv6 servers.",
  "vendor": "RIOT-OS",
  "product": "RIOT",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 2026.04"
      ],
      "ecosystem": "riot",
      "fixed_versions": [
        "fc1ff4ccd54fafa0045dfa11de5ecbacecb7a43a"
      ],
      "package_name": "RIOT",
      "purl": null
    }
  ],
  "cwes": [
    125
  ],
  "cvss_score": 9.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": 0.0037,
  "epss_percentile": 0.2962,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 24.98814691666667,
  "t0_at": "2026-10-16T16:50:58.750000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-16T16:50:58.750000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-16T16:50:58.750000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-49868"
    }
  }
}