CVE-2026-79977

{
  "etk_id": "ETK-2026-3129",
  "cve_id": "CVE-2026-79977",
  "display_id": "CVE-2026-79977",
  "ghsa_id": "GHSA-w8h4-r8m3-rf5j",
  "euvd_id": "EUVD-2026-109140",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Unauthenticated endpoint update in Zephyr WireGuard",
  "summary": "Zephyr WireGuard versions 4.4.0 through 4.4.2 can accept an unauthenticated update to a configured peer endpoint. An attacker able to reach the WireGuard UDP listener can redirect tunnel traffic and disrupt connectivity when the peer has no active session or valid handshake.",
  "mitigation": "Upgrade Zephyr to version 4.5.0. Until upgraded, disable WireGuard where it is not required or restrict network access to its UDP listener to trusted peers.",
  "vendor": "other",
  "product": "other:zephyr",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 4.4.0, <= 4.4.2"
      ],
      "ecosystem": "other",
      "fixed_versions": [
        "4.5.0"
      ],
      "package_name": "zephyr",
      "purl": null
    }
  ],
  "cwes": [
    306
  ],
  "cvss_score": 8.2,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 23.23578375,
  "t0_at": "2026-10-23T19:56:13.873000+00:00",
  "signals": {
    "public_poc": {
      "at": "2026-10-23T19:15:49+00:00",
      "days": -0.028065659722222223,
      "is_lower_bound": false,
      "measured_at": "2026-10-23T19:56:13.873000+00:00",
      "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-w8h4-r8m3-rf5j"
    },
    "trigger_signal": {
      "at": "2026-10-23T19:56:13.873000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-23T19:56:13.873000+00:00",
      "url": "https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-w8h4-r8m3-rf5j"
    }
  }
}