Patch tracker / CVE reference / CVE-2026-50490

CVE-2026-50490

CVE-2026-50490 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 9 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
4.9%
EPSS, 30 days
High
Severity

Not in the CISA KEV catalog. EPSS exploit probability 4.9%. CVSS 7.0 (High).

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

Senserva AI Opinion for CVE-2026-50490

CVE-2026-50490 is a Windows Installer elevation of privilege flaw rated Severity High with a CVSS score of 7.0, affecting Windows 10 Version 1809 (32-bit and x64) and Windows Server 2019. Because it abuses the Installer service, an attacker who already has a foothold on these older 1809-based systems can escalate to higher privileges, and lingering 1809 endpoints are common in environments that skipped feature upgrades. It is not listed in CISA KEV and has no known ransomware association, so this is patch-on-schedule rather than emergency response.

Do this: Deploy the vendor update for Windows 10 1809 and Windows Server 2019 hosts, prioritizing multi-user servers and any 1809 systems still running past their intended lifecycle.action

AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2026-50490

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 5%.
Fixed by KB5099444 and 8 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-2026-50490

Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5099444, KB5099445, KB5099535, KB5099536, KB5099538, KB5099539, KB5099540, KB5101649, KB5101650 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-2026-50490. 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.

KB5099444KB5099445KB5099535KB5099536KB5099538KB5099539KB5099540KB5101649KB5101650

Scope and sources

Affected products
Fixed by the same updates
CVE-2026-56155CVE-2026-32202CVE-2026-57092CVE-2026-42990CVE-2026-49172CVE-2026-50447CVE-2026-50518CVE-2026-54990
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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