Stack-based buffer overflow in Windows Host Guardian Service allows an unauthorized attacker to deny service over a network.
Fix
Microsoft's update · Important
- KB5126868 — Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607, Windows Server 2016, Windows Server 2016 (Server Core installation) · build 10.0.14393.9612 · restart required
- KB5126651 — Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809, Windows Server 2019, Windows Server 2019 (Server Core installation) · build 10.0.17763.9376 · restart required
- KB5126655 — Windows Server 2022, Windows Server 2022 (Server Core installation) · build 10.0.20348.5761 · restart required
- KB5126646 — Windows Server 2025, Windows Server 2025 (Server Core installation) · build 10.0.26100.33650 · restart required
From the 2026-Oct release note of Microsoft's Security Update Guide, revised 2026-10-29 · Exploitation Less Likely.
Patch, vendor advisory and mitigation references on NVD 1
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96248 Patch, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 3
- Cpes+8 CPE criteria (now 8)NVD modified 2026-10-16 16:08
- StatusAwaiting Analysis → AnalyzedNVD modified 2026-10-16 16:08
- First seenCVSS 7.5NVD modified 2026-10-13 20:19
Affected (CPE criteria) 8
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*
References 1
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96248 Patch, Vendor Advisory