Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation requires an administrator to have previously performed an affected repair operation on the server.
Security updates
23.2 — https://support.microsoft.com/en-us/servicing/azure/file-sync/update/2026/azure-file-sync-agent-v23-2-november
Vulnerabilities 1
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High 7.0
Microsoft Azure File Sync Elevation of Privilege Vulnerability
Incorrect permission assignment for critical resource in Azure File Sync allows an authorized attacker to elevate privileges locally.
Revision history
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#1
Information published.
References
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CVE-2026-118288 Microsoft Azure File Sync Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118288
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss