Microsoft has warned that some Windows devices upgraded to Windows 11 24H2 or 25H2 may fail to install the June 2026 cumulative updates, resulting in errors 0x80073712 (ERROR_SXS_COMPONENT_STORE_CORRUPT) or 0x800f0993 (PSFX_E_REBASE_HYDRATION_CANDIDATES_MISSING). The issue affects a small subset of devices originally running Windows 10 versions 21H2 or 22H2, or Windows 11 23H2, that were then upgraded to Windows 11 24H2 or 25H2. Microsoft states that no new devices upgraded after May 19, 2026, should be affected, and a system restart may expedite the fix rollout. For devices already impacted, Microsoft advises removing a problematic update package via DISM or performing an in-place upgrade of Windows 11 to restore update functionality. Microsoft has released updates to prevent this issue on future upgrades. This is an update installation failure issue, not a security vulnerability or exploit.

Affected devices cannot install monthly Windows cumulative updates, which may prevent them from receiving important security and feature updates. The failure is due to component store corruption or missing hydration candidates, causing update errors 0x80073712 and 0x800f0993. This may leave systems without the latest patches until the issue is resolved. However, this does not indicate a direct security compromise or exploit in the wild.

Microsoft has released fixes that will automatically apply to most devices after a system restart. No further action is required for new upgrades after May 19, 2026. For devices already affected, users should run the command "dism /online /remove-package /packagename:Package_for_RollupFix~31bf3856ad364e35~amd64~~26100.1742.1.10" in an elevated Command Prompt to remove the problematic package. If this does not resolve the issue, performing a Windows 11 in-place upgrade is recommended. These steps restore the ability to install future updates.