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A vulnerability allowing a low-privileged local user to write arbitrary files with SYSTEM privileges during the installation of Veeam Backup for Microsoft 365, which can lead to privilege escalation or denial of service.

Exact source revision recorded 27 Oct 2026 17:43:43 UTC. It does not establish the source's current position. Latest evidence.

cve-program · CVE-2025-64394

Published

Backup for Microsoft 365

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "defaultStatus": "unaffected",
                    "vendor": "Veeam",
                    "product": "Backup for Microsoft 365",
                    "versions": [
                        {
                            "version": "8.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.6.0.1102",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 30 Oct 16:58 UTC · 272 of 272 readable · 270 fully read · documentation 469/469 current