CVE-2026-62908
Windows Backup Engine Elevation of Privilege Vulnerability
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Backup Engine allows an authorized attacker to elevate privileges locally.
In plain language
AI Act nowCVE-2026-62908 is a Windows Backup feature bug where a standard user who can run a backup at the same time as other activity may be able to gain full control—serious for anyone using affected Windows versions, especially if untrusted users already have low-level access.
CVE-2026-62908 is a local elevation-of-privilege issue (race condition) in the Windows Backup Engine where concurrent backup-related execution mishandles shared resources, enabling a low-privileged, authenticated attacker to gain administrative control of the affected Windows system.
What to do now
- Check whether your organization runs any of these systems: windows 10, windows 11, windows server 2012, windows server 2016, windows server 2019, windows server 2022, windows server 2025, windows server 2012 r2.
- Verify your installed Windows build/patch level on each affected machine and compare it to the fixed versions in the MSRC update guide for CVE-2026-62908.
- Upgrade/patch each affected machine to the fixed version that matches your Windows edition (exact target versions are listed in the “what to do” section below).
- If patching cannot be done immediately, restrict who can run backup/backup-related operations and remove low-level access from untrusted or temporary users until updates are applied.
CVSS Vector Breakdown
AV:LAttack VectorAC:HAttack ComplexityPR:LPrivileges RequiredUI:NUser InteractionS:UScopeC:HConfidentialityI:HIntegrityA:HAvailabilityWeaknesses
Affected Products
Exploitability
Attack Graph
Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.
MITRE ATT&CK
2 techniquesReferences
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