Patch tracker / CVE reference / CVE-2026-34341

CVE-2026-34341

CVE-2026-34341 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 7.0 (High). Microsoft has shipped the fix: deploy one of the 16 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

High
7.0
CVSS v3
2.3%
EPSS, 30 days
High
Severity

Not in the CISA KEV catalog. EPSS exploit probability 2.3%. CVSS 7.0 (High).

This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.

Senserva AI Opinion for CVE-2026-34341

This is an LLDP elevation of privilege flaw carrying a Critical rating with a CVSS 9.8, which is unusually high for a privilege escalation bug and suggests it can be triggered over the network rather than requiring an existing local session. Exposure is narrow: only Windows 10 Version 1809 (32-bit and x64) and Windows Server 2019 are listed as affected. The 80 percent EPSS score signals a strong likelihood of exploitation activity even though it is not yet in CISA KEV or tied to ransomware.

Do this: Deploy the Microsoft patch to all Windows 10 1809 and Server 2019 hosts now, prioritizing systems that process LLDP traffic on shared network segments.

AI-generated from public data, 2026-07-26. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2026-34341

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

Schedule normally
No exploitation observed as of 2026-10-14: not in the CISA KEV catalog, EPSS 2%.
Fixed by KB5087420 and 15 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.
Do this now: Deploy with your normal update cycle. This page refreshes daily; the verdict changes the day the data does.

Official patch(es) for CVE-2026-34341

Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5087420, KB5087423, KB5087424, KB5087470, KB5087471, KB5087537, KB5087538, KB5087539, KB5087541, KB5087544, KB5087545, KB5089466, KB5089548, KB5089549, KB5093998, KB5094127 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-2026-34341. 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.

KB5087420KB5087423KB5087424KB5087470KB5087471KB5087537KB5087538KB5087539KB5087541KB5087544KB5087545KB5089466KB5089548KB5089549KB5093998KB5094127

Scope and sources

Affected products
Fixed by the same updates
CVE-2025-54518CVE-2026-41089CVE-2026-41096CVE-2026-44815CVE-2026-45657CVE-2026-47291CVE-2026-42904CVE-2025-10263
Authoritative references
Official CVE record (cve.org)NVD detailMicrosoft MSRCFIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.

New to a term on this page? CVE, KB, KEV, CVSS, and EPSS are each explained once, on the Senserva security lexicon. Reference: Microsoft CVE and vulnerability management and the Microsoft patching guide.
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