Patch tracker / CVE reference / CVE-2026-50508
CVE-2026-50508
CVE-2026-50508 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 6.5 (Medium). Its EPSS score puts the probability of exploitation in the next 30 days at 12%. Microsoft has shipped the fix: deploy one of the 6 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Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date.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 6.5 (Medium). Fixed by 6 Microsoft security updates.
Risk summary
Not in the CISA KEV catalog. EPSS exploit probability 12%. CVSS 6.5 (Medium).
This CVE is among the top 5% of tracked Microsoft CVEs by EPSS exploit probability.
NTLM spoofing on Windows Server 2022 and Server 2004 core carries a Critical 9.8 rating, and NTLM relay-style weaknesses have a long history of enabling lateral movement. An attacker who can spoof within the NTLM exchange may impersonate a server or coerce authentication. Domain member servers exposed to internal clients are the exposure point.
Do this: Patch Windows Server 2022 and 2004 core hosts, and where feasible move toward disabling NTLM in favor of Kerberos to shrink this attack surface.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-50508
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2026-50508
Elevated priority: high severity or a meaningful exploitation probability, sooner if an affected product is internet-facing. In Intune or Defender, confirm whether the fixing updates KB5093998, KB5094041, KB5094042, KB5094122, KB5094127, KB5094128 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-2026-50508. 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 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 Server 2012
- Windows Server 2012 (Server Core installation)
- Windows Server 2012 R2
- Windows Server 2012 R2 (Server Core installation)
- Windows Server 2016
- Windows Server 2016 (Server Core installation)
- Windows Server 2022
- Windows Server 2022 (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.