Patch tracker / CVE reference / CVE-2026-26171
CVE-2026-26171
CVE-2026-26171 is a high severity Microsoft vulnerability with a CVSS score of 7.5. Microsoft has shipped the fix: deploy one of the 3 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
Risk summary
Not in the CISA KEV catalog. EPSS exploit probability 2.3%. CVSS 7.5 (High).
This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.
A .NET denial of service flaw whose affected list leads with PowerShell 7.5, alongside .NET 10.0 on Linux and .NET 8.0 on Windows, rated High Severity at CVSS 7.5. PowerShell 7 is the interesting angle: automation servers and CI runners execute it constantly, and a DoS there stalls scheduled jobs and pipelines rather than a user-facing site. At 2 percent exploit probability this rides the normal update train.
Do this: Update PowerShell 7.5 installs on automation and CI hosts along with the underlying .NET runtimes.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-26171
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2026-26171
Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5086095, KB5086096, KB5086097 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-2026-26171. 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
- 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.