Backup for Microsoft 365 — security advisory

{
  "id": "80816e34751fae920e60380877301e3e63cf874f7e3e9dba3a751e391afc2c97",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-106077",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-106077",
    "summary": "A vulnerability allowing a user with the Veeam Backup for Microsoft 365 Administrator role to read arbitrary files on the backup server with LocalSystem privileges.",
    "evidence": "cve:CVE-2026-106077",
    "products": [
      {
        "name": {
          "value": "Backup for Microsoft 365",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-106077",
      "aliases": [
        "CVE-2026-106077"
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 8.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N"
          }
        }
      ],
      "affected": [
        {
          "vendor": "Veeam",
          "product": "Backup for Microsoft 365",
          "versions": [
            {
              "status": "affected",
              "version": "8.0",
              "versionType": "semver",
              "lessThanOrEqual": "8.5.0.1014"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-27T16:16:58.905Z",
      "provider": "cve",
      "references": [
        "https://www.veeam.com/kb4957"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
          "shortName": "hackerone",
          "dateUpdated": "2026-10-27T16:16:58.905Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-106077",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 394446,
  "published_at": "2026-10-27T16:16:58.905+00:00"
}