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Microsoft WUSA network-share Windows update failure

Service Disruption
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Last updated
Happening score
H score 0
1 unique sources, 1 articles

Summary

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Microsoft has fixed a WUSA problem that caused Windows updates to fail when installed from a network share, disrupting update deployment on Windows 11 24H2/25H2 and Windows Server 2025 enterprise systems. The failure could surface as ERROR_BAD_PATHNAME when a share held multiple .msu files. Microsoft first reduced the impact with Known Issue Rollback on some devices before resolving the issue in June 2026 cumulative updates.

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H score1 First: 18.06.2026 13:14 Last: 18.06.2026 13:14 Sources 1

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Timeline

  1. 12.06.2026 14:44 2 articles · 1mo ago

    Microsoft WUSA network-share Windows update failure

    Initial Disclosure

    Microsoft acknowledged the WUSA update-installation failure in August 2025 after reports that updates could not be installed from a network share with multiple .msu files. A mitigation later rolled out for some non-managed devices through Known Issue Rollback in September 2025.

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