CVE-2026-126621

{
  "etk_id": "ETK-2026-4160",
  "cve_id": "CVE-2026-126621",
  "display_id": "CVE-2026-126621",
  "ghsa_id": "GHSA-2q54-5c4c-vg9w",
  "euvd_id": "EUVD-2026-123337",
  "status": "published",
  "anchor_state": "anchored",
  "title": "TLS file path confusion in hMailServer",
  "summary": "hMailServer 6.0.0-B1 through 6.3.7 on Windows can load unintended TLS-related files when configured paths contain certain non-ASCII names. A local attacker able to create a conflicting path may cause untrusted certificate authorities to be accepted, intercept object-store traffic, obtain ACME-managed private keys, or prevent TLS listeners from starting. Default configurations are not affected; exposure requires affected TLS file paths and, for some impacts, optional client-certificate, object-store, or ACME features.",
  "mitigation": "Upgrade Windows installations to hMailServer 6.3.8. Until upgraded, use ASCII-only TLS-related file paths, restrict write access near those paths, and disable optional client-certificate, object-store, and ACME features where not required.",
  "vendor": "Progressive Robot Ltd",
  "product": "hMailServer",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 6.0.0-B1, <= 6.3.7"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "hMailServer",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 35.64627573333333,
  "t0_at": "2026-11-11T08:36:26.283000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-11T08:36:26.283000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-11T08:36:26.283000+00:00",
      "url": "https://github.com/advisories/GHSA-2q54-5c4c-vg9w"
    }
  }
}