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June Backup issues may arise as a result of Windows Server updates


After installing the June 2022 Patch Tuesday Windows updates, Microsoft warns that some applications may fail to backup data using Volume Shadow Copy Service (VSS).

The problem arises as a result of security measures implemented to address an elevation of privilege vulnerability (CVE-2022-30154) in the Microsoft File Server Shadow Copy Agent Service (RVSS).


On affected systems, Windows backup applications may receive E ACCESSDENIED errors during shadow copy creation operations, and a “FileShareShadowCopyAgent Event 1013” will be logged on the File Server.

Systems running Windows Server are not vulnerable by default because RVSS is an optional component. Furthermore, Windows Client editions are not vulnerable to attacks attempting to escalate privileges using CVE-2022-30154 exploits.

Affected Windows versions:

  • Microsoft Windows Server 2022 (KB5014678)
  • Version 20H2 of Windows 10. (KB5014699)
  • Microsoft Windows Server 2019 (KB5014692)
  • Microsoft Windows Server 2016 (KB5014702)
  • Microsoft Windows Server 2012 R2 (KB5014746)
  • Microsoft Windows Server 2012 (KB5014747)

Backups may fail if the account used to perform copy operations does not meet the privilege requirements for Administrators or Backup Operators, according to Microsoft. To resolve the issue, switch to a domain account on the File Server. Microsoft recommends that both the Application Server and the File Server install Windows updates released on June 14 and later.