Microsoft fixes bug that blocked Smart App Control activation after October update
Microsoft says it has resolved a known issue that stopped some users from activating Smart App Control after installing the October 2026 KB5127648 Windows 11 security update. The item does not describe any exploitation or data exposure.
Written by a model from the sources below. Verify against them.
- Kind
- Security outage
- Vendor
- Microsoft
- Product
- Windows 11 Smart App Control
- Status
- Reported, not confirmed
- First seen
What to do
Install the latest Windows Update so the fix is applied
Open Windows Security and check whether Smart App Control is turned on
Keep Smart App Control enabled once the fix is installed
Timeline
- Made public by BleepingComputer
- First seen by cve.now
Evidence 1
- PressBleepingComputer
“Microsoft has resolved a known issue that prevented some users from activating the Smart App Control security feature after installing the October 2026 KB5127648 Windows 11 security update.”
Corrections
None so far.
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Questions about SZB-9ad81aaa3b
Has Microsoft confirmed it?
BleepingComputer reports an attempted attack. None of the sources says the attackers got in. No statement from Microsoft has reached cve.now yet.Source: BleepingComputer
What should Microsoft users do?
Install the latest Windows Update so the fix is applied. Open Windows Security and check whether Smart App Control is turned on. Keep Smart App Control enabled once the fix is installed.