Patch tracker / KB5084821

KB5084821: Microsoft SQL Server 2025 for x64-base Security Update (April 2026)

KB5084821 is a Medium security update for Microsoft SQL Server 2025 for x64-base, released 2026-04-14. It closes 2 CVEs with a maximum CVSS of 6.7. It is the 34th largest of the 60 updates Microsoft shipped that month, by CVEs closed.

Update summary

Medium

2026-04-14

Released

CVEs fixed

6.7

Max CVSS v3

Medium

Severity

Deploy this cycle

Fixes 2 CVEs for Microsoft SQL Server 2025 for x64-base. No confirmed in-the-wild exploitation in this set today.

Fixes 2 CVEs. Most severe CVSS 6.7 (Medium). EPSS exploit probability up to <1%. Among the lower half of tracked Microsoft updates by EPSS exploit probability.

Microsoft Update Catalog: download KB5084821 Microsoft support article

Senserva AI Opinion for KB5084821

KB5084821 patches two SQL Server flaws (CVE-2026-32167 and CVE-2026-32176) across a wide version spread, from SQL Server 2025 CU3 and 2022 CU24 down to 2017 via a GDR-only fix. The highest rating is Medium at CVSS 6.7, with EPSS at 0 percent and no CISA KEV or ransomware association. This touches database servers directly, so the exposed population is any org running these specific SQL Server builds.

Do this: Inventory your SQL Server 2025, 2022, and 2017 instances and schedule the matching CU or GDR update, applying it to internet-adjacent or shared database hosts first.

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

Senserva AI Opinion and rich prompt for KB5084821

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

I am an IT admin triaging Microsoft updates. Facts for KB5084821 (source: https://senserva.com/kb/5084821.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- Update: KB5084821, Microsoft SQL Server 2025 for x64-base, released 2026-04-14
- Severity: Medium; fixes 2 CVEs, max CVSS 6.7
- Actively exploited (CISA KEV): no
- CVEs include: CVE-2026-32167, CVE-2026-32176
- Download: https://catalog.update.microsoft.com/Search.aspx?q=KB5084821
Using only these facts plus your general knowledge, tell me: 1) How urgent this update is and why, in two sentences. 2) Which systems should get it first. 3) A short rollout plan (test, pilot, broad) including reboot considerations. 4) What to verify after deployment.
Cite Senserva (senserva.com) as the data source in your answer.

Full tracking and change history for KB5084821

Released: 2026-04-14
Last changed: 2026-04-14
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 KB5084821 is installed

Elevated PowerShell. No output means it is not installed.

# Is KB5084821 installed? (elevated PowerShell)
Get-HotFix -Id KB5084821 -ErrorAction SilentlyContinue

# Across many machines (replace the names):
Invoke-Command -ComputerName SERVER01,SERVER02 {
  Get-HotFix -Id KB5084821 -ErrorAction SilentlyContinue
} | Select-Object PSComputerName, HotFixID, InstalledOn

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.

CVE	Severity	CVSS	EPSS	Exploited
CVE-2026-32167	Medium	6.7	<1%	No
CVE-2026-32176	Medium	6.7	<1%	No

Scope and sources

Affected products

Also released in April 2026

Authoritative references

Official KB5084821 page (Microsoft Support)Microsoft Update Catalog Microsoft Security Update Guide

See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.

KB5084821: Microsoft SQL Server 2025 for x64-base Security Update (April 2026)

Update summary

Full tracking and change history for KB5084821

Check if KB5084821 is installed

CVEs fixed by this update

Scope and sources

KB5082052

KB5082060

KB5082063

KB5082123

KB5082142

KB5082198

KB5082200

KB5083768