CVE-2026-77100

{
  "etk_id": "ETK-2026-1541",
  "cve_id": "CVE-2026-77100",
  "display_id": "CVE-2026-77100",
  "ghsa_id": "GHSA-83mj-r2gx-wf57",
  "euvd_id": "EUVD-2026-98762",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Heap-based buffer overflow in Commvault MediaAgent",
  "summary": "Commvault MediaAgent is affected by a heap-based buffer overflow that can disrupt service availability. The advisory does not state the preconditions required for an attacker to trigger the issue.",
  "mitigation": "Upgrade MediaAgent and HyperScale installations to the vendor's resolved maintenance release. Consult Commvault support or release documentation for the applicable maintenance version.",
  "vendor": "Commvault",
  "product": "Commvault Cloud",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 11.46.0, <= 11.46.29",
        ">= 11.44.0, <= 11.44.24",
        ">= 11.40.0, <= 11.40.77",
        ">= 11.36.0, <= 11.36.126"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "Commvault Cloud",
      "purl": null
    }
  ],
  "cwes": null,
  "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": 0.0032,
  "epss_percentile": 0.2315,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 36.17438908333333,
  "t0_at": "2026-10-13T14:27:01.168000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-13T14:27:01.168000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-13T14:27:01.168000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-77100"
    }
  }
}