Patch tracker / CVE reference / CVE-2026-49160
CVE-2026-49160
CVE-2026-49160 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 7.5 (High). Its EPSS score puts the probability of exploitation in the next 30 days at 57%. Microsoft has shipped the fix: deploy one of the 8 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date. If you are unsure, check the linked source before you act, and tell us when we are wrong so we can fix it.
Microsoft rates it Important. CVSS 7.5 (High). Fixed by 8 Microsoft security updates.
Risk summary
Not in the CISA KEV catalog. EPSS exploit probability 57%. CVSS 7.5 (High).
This CVE is among the top 5% of tracked Microsoft CVEs by EPSS exploit probability.
CVE-2026-49160 is a Denial of Service flaw in HTTP.sys, the kernel driver that handles HTTP requests, carrying a Critical severity rating with CVSS 9.8. Exposed systems include Windows Server 2019 Server Core installations plus Windows 10 Version 1809 and 21H2 32-bit builds, which is unusual since Server Core is often deployed for internet-facing web roles where HTTP.sys is directly reachable. It is not in CISA KEV and has no known ransomware use, but the 48 percent EPSS score indicates a meaningful near-term chance of exploit activity for a bug that can knock services offline remotely.
Do this: Apply the Microsoft patch to all Windows Server 2019 Server Core and affected Windows 10 1809 and 21H2 32-bit systems, prioritizing any host exposing HTTP.sys services to untrusted networks.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-49160
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2026-49160
High priority: EPSS puts the odds of near-term exploitation high. In Intune or Defender, confirm whether the fixing updates KB5093998, KB5094122, KB5094123, KB5094125, KB5094126, KB5094127, KB5094128, KB5095051 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.
Apply the Microsoft security updates below to fix CVE-2026-49160. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.
Scope and sources
- Affected products
- Windows 10 Version 1607 for 32-bit Systems
- Windows 10 Version 1607 for x64-based Systems
- Windows 10 Version 1809 for 32-bit Systems
- Windows 10 Version 1809 for x64-based Systems
- Windows 10 Version 21H2 for 32-bit Systems
- Windows 10 Version 21H2 for ARM64-based Systems
- Windows 10 Version 21H2 for x64-based Systems
- Windows 10 Version 22H2 for 32-bit Systems
- Windows 10 Version 22H2 for ARM64-based Systems
- Windows 10 Version 22H2 for x64-based Systems
- Windows 11 Version 22H2 for ARM64-based Systems
- Windows 11 Version 22H2 for x64-based Systems
- Windows 11 Version 23H2 for ARM64-based Systems
- Windows 11 Version 23H2 for x64-based Systems
- Windows 11 Version 24H2 for ARM64-based Systems
- Windows 11 Version 24H2 for x64-based Systems
- Windows 11 Version 25H2 for ARM64-based Systems
- Windows 11 Version 25H2 for x64-based Systems
- Windows 11 Version 26H1 for ARM64-based Systems
- Windows 11 version 26H1 for x64-based Systems
- Windows Server 2016
- Windows Server 2016 (Server Core installation)
- Windows Server 2019
- Windows Server 2019 (Server Core installation)
- Windows Server 2022
- Windows Server 2022 (Server Core installation)
- Windows Server 2025
- Windows Server 2025 (Server Core installation)
- Windows Server, version 2004 (Server Core installation)
- Fixed by the same updates
- Authoritative references
Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.