CVE-2026-108457

Fix

Microsoft's update · Critical

• KB5126653 — Windows 11 Version 23H2 · build 10.0.22631.7652 · restart required
• KB5126657 — Windows 10 Version 21H2, Windows 10 Version 21H2 for 32-bit Systems · build 10.0.19044.7807 · restart required
• KB5126657 — Windows 10 Version 22H2, Windows 10 Version 22H2 for 32-bit Systems · build 10.0.19045.7807 · restart required
• KB5126655 — Windows Server 2022 (Server Core installation), Windows Server 2022 · build 10.0.20348.5761 · restart required
• KB5126646 — Windows Server 2025 (Server Core installation), Windows Server 2025 · build 10.0.26100.33650 · restart required

From the 2026-Oct release note of Microsoft's Security Update Guide, revised 2026-10-28 · Exploitation Less Likely.

Patch, vendor advisory and mitigation references on NVD 1

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108457 Patch, Vendor Advisory

Vendor advisories in the News 1

• Microsoft October 2026 Security Updates: 1476 CVEs, 1 exploited, 96 critical Microsoft Security Update Guide · 2026-10-13

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.