Microsoft Releases Windows 11 Cumulative Updates KB5124008 and KB5122880
Updates address security vulnerabilities and bugs across multiple Windows 11 versions
Key Takeaways
- Microsoft released two cumulative updates for Windows 11 on 2026-09-08.
- KB5124008 covers versions 25H2 and 24H2; KB5122880 covers version 23H2.
- Updates are distributed via Windows Update and the Microsoft Update Catalog.
- The updates patch security vulnerabilities and fix bugs.
- No active exploitation of the patched vulnerabilities has been reported.
Quick answers
- What happened?
- Microsoft has released two cumulative updates for Windows 11 to patch security vulnerabilities and resolve bugs. KB5124008 targets versions 25H2 and 24H2, while KB5122880 targets version 23H2. The updates are being distributed via Windows Update and the Microsoft Update Catalog. No active exploitation of the patched vulnerabilities has been reported in the available information.
- Which products are affected?
- Windows 11
- What should defenders do?
- Apply the respective cumulative update: KB5124008 for Windows 11 25H2/24H2 and KB5122880 for Windows 11 23H2 via Windows Update or the Microsoft Update Catalog.
Microsoft has released Windows 11 cumulative updates KB5124008 and KB5122880. KB5124008 is available for Windows 11 versions 25H2 and 24H2. KB5122880 is available for Windows 11 version 23H2. Both updates are delivered through Windows Update and the Microsoft Update Catalog. The releases address security vulnerabilities and bugs. Specific CVE identifiers and detailed vulnerability information were not included in the source summary. Users are advised to apply the relevant update for their Windows 11 version to maintain system security and stability. As of the publication date, no active exploitation of the patched vulnerabilities has been reported.
Security Details
The updates address security vulnerabilities and bugs. Specific CVE details and vulnerability descriptions were not provided in the source summary.
Affected products
Windows 11
Mitigation
Apply the respective cumulative update: KB5124008 for Windows 11 25H2/24H2 and KB5122880 for Windows 11 23H2 via Windows Update or the Microsoft Update Catalog.
Sources
BleepingComputer
Windows 11 cumulative updates KB5124008 & KB5122880 released
Sep 8, 2026 · 17:57
Original link
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