Patch tracker / CVE reference / CVE-2025-55677
CVE-2025-55677
CVE-2025-55677 is a high severity Microsoft vulnerability with a CVSS score of 7.8. Microsoft has shipped the fix: deploy the update 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 6.0%. CVSS 7.8 (High).
This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.
The Device Association Broker service, which pairs devices to user sessions, carries a Critical (CVSS 9.9) elevation of privilege flaw on Windows 11 25H2 and Windows Server 2025 Server Core. Broker services are classic escalation targets because they accept requests from unprivileged callers while holding elevated tokens. EPSS puts exploitation probability at 6 percent.
Do this: Patch Windows Server 2025 Server Core installations first, then the Windows 11 25H2 client population.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2025-55677
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2025-55677
Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing update KB5066835 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.
Apply the Microsoft security update below to fix CVE-2025-55677. 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 update
- Authoritative references
Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.