Patch tracker / KB5099415

KB5099415: Windows Server 2016 Security Update (July 2026)

KB5099415 is a High security update for Windows Server 2016, released 2026-07-14. It closes 1 CVE with a maximum CVSS of 7.8. The most likely of them to be attacked is CVE-2026-50480, which FIRST.org rates at 64% probability of exploitation in the next 30 days.

Update summary

High
2026-07-14
Released
1
CVEs fixed
7.8
Max CVSS
High
Severity
Deploy this cycle
Fixes 1 CVE for Windows Server 2016. No confirmed in-the-wild exploitation in this set today.

Fixes 1 CVE. Most severe CVSS 7.8 (High). EPSS exploit probability up to <1%. Among the lower half of tracked Microsoft updates by EPSS exploit probability.

Senserva found thisread these before you deploy broadly

Microsoft documents 1 known issue with this update.

  • We are currently not aware of any issues in this update.

The full text, quoted from Microsoft

Microsoft Update Catalog: download KB5099415Microsoft support article
Senserva AI Opinion for KB5099415

KB5099415 is an Internet Explorer cumulative update for the Windows Server 2012 and 2012 R2 family, including Server Core installations, in the July 2026 Patch Tuesday cycle. Detail is provisional because Microsoft has not yet published the per-update CVE breakdown, and the MSRC release document maps no named zero-days here. What matters is that these server versions are past mainstream support and often run only under Extended Security Updates, so this update reaches you only if your ESU coverage is current.

Do this: Confirm your Windows Server 2012 and 2012 R2 ESU licensing and activation status so KB5099415 will actually install, then stage it on a Server Core host first.

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

Senserva AI Opinion and rich prompt for KB5099415

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

Full tracking and change history for KB5099415

Released
2026-07-14
Last changed
2026-07-14
Changes tracked
1

Senserva began recording day-to-day change history on 2026-07-07, and refreshes it several times a day. Release dates are historical where Microsoft publishes them; revision history is tracked from that date forward, so it does not include changes made before then.

Check if KB5099415 is installed

Elevated PowerShell. No output means it is not installed.

Known issues, from Microsoft

Quoted from Microsoft's support article for KB5099415 (checked 2026-08-12). Verify against the article before acting.

We are currently not aware of any issues in this update.

CVEs fixed by this update

Sorted exploited-first, then by CVSS. Every CVE links to its Senserva page with the full risk facts, references, and a ready-to-paste AI prompt.

CVESeverityCVSSEPSSExploited
CVE-2026-50480High7.864%No

Scope and sources

Affected products
Also released in July 2026

KB5099444

185 CVEs · Critical · exploited

KB5099445

174 CVEs · Critical · exploited

KB5099535

261 CVEs · Critical · exploited

KB5099536

389 CVEs · Critical · exploited

KB5099538

312 CVEs · Critical · exploited

KB5099539

314 CVEs · Critical · exploited

KB5099540

326 CVEs · Critical · exploited

KB5101649

383 CVEs · Critical · exploited

The full month, summarized: Microsoft Patch Tuesday.

Authoritative references
Official KB5099415 page (Microsoft Support)Microsoft Update CatalogMicrosoft Security Update Guide

See this and every Microsoft update ranked by real-world risk on 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.
Provided as is, without warranty; verify against the vendor advisory before acting. Data notice and terms.