Patch tracker / CVE reference / CVE-2026-21262

CVE-2026-21262

Updated July 21, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.

Schedule normally
No exploitation observed: not in the CISA KEV catalog, EPSS 2%.
Fixed by KB5077464 and 9 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.

High severity Microsoft vulnerability, CVSS 8.8. Fixed by 10 Microsoft security updates.

All about CVE-2026-21262: the Senserva AI read, whether it is exploited, the official patches, its change history, and the questions admins ask.

Senserva AI read on CVE-2026-21262Official patches for CVE-2026-21262Change historyAdmin questions

CVE-2026-21262 is a high severity Microsoft vulnerability with a CVSS score of 8.8. Microsoft has shipped the fix: deploy one of the 10 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

High

Risk summary

CVSS base
8.8
EPSS exploit probability
2.0%
Severity
High
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Senserva AI Opinion for CVE-2026-21262

CVE-2026-21262 is an elevation of privilege flaw in Microsoft SQL Server, spanning the GDR branches of SQL Server 2016 SP3, 2017, and 2019 on x64 systems. The high CVSS 8.8 score reflects that a lower privileged database account could escalate to broader control, though EPSS puts current exploit probability at 2 percent and it is not in CISA KEV or tied to ransomware. What matters is that the affected versions are older but still widely deployed in production, and the GDR path means you can patch without pulling in cumulative update changes.

Do this: Identify which SQL Server 2016 SP3, 2017, and 2019 x64 instances are on the GDR branch and apply the corresponding GDR security update.

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

Senserva AI Opinion and rich prompt for CVE-2026-21262

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

Full tracking and change history for CVE-2026-21262

Published
2026-03-10
Last revised
2026-03-10
Changes tracked
1

Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.

Exploitation and severity

Not in the CISA KEV catalog. EPSS exploit probability 2.0%. CVSS 8.8 (High).

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

Official patch(es) for CVE-2026-21262

Moderate priority: schedule it in your normal patch cycle. In Intune or Defender, confirm whether the fixing updates KB5077464, KB5077465, KB5077466, KB5077468, KB5077469, KB5077470, KB5077471, KB5077472, KB5077473, KB5077474 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-2026-21262. 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.

KB5077464KB5077465KB5077466KB5077468KB5077469KB5077470KB5077471KB5077472KB5077473KB5077474

Affected products

Common questions about CVE-2026-21262

Is CVE-2026-21262 actively exploited?

It is not currently listed in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score puts the probability of exploitation in the next 30 days at 2.0%.

What patch fixes CVE-2026-21262?

Microsoft fixed CVE-2026-21262 in KB5077464, KB5077465, KB5077466, KB5077468, KB5077469, KB5077470, KB5077471, KB5077472, KB5077473, KB5077474. Download from the Microsoft Update Catalog, or let Intune, Windows Update, or WSUS deliver it.

Which products are affected by CVE-2026-21262?

Microsoft SQL Server 2016 for x64-based Systems Service Pack 3 (GDR), Microsoft SQL Server 2017 for x64-based Systems (GDR), Microsoft SQL Server 2019 for x64-based Systems (GDR).

Can I ask my own AI about CVE-2026-21262?

Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2026-21262's key facts: severity, CVSS, EPSS exploit probability, CISA KEV status, and the fixing KB. Copy it into Claude, ChatGPT, or Copilot for a triage plan; the data is refreshed three times a day (5 AM, 12:30 PM, and 7 PM US Central).

Fixed by the same updates

If you are patching CVE-2026-21262, the same updates also fix these:

CVE-2026-26115CVE-2026-26116

Authoritative references

Official CVE record (cve.org)NVD detailMicrosoft MSRCFIRST.org EPSS

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Lexicon: the terms on this page
CVE
Common Vulnerabilities and Exposures. A unique ID for one publicly known vulnerability, such as CVE-2025-1234.
KB
Microsoft Knowledge Base article. The identifier for a specific Microsoft update.
KEV
CISA Known Exploited Vulnerabilities. CVEs confirmed exploited in the wild. Fix these first.
CVSS
Common Vulnerability Scoring System. A standardized Severity score from 0 to 10.
EPSS
Exploit Prediction Scoring System. The probability a CVE will be exploited in the next 30 days.
MSRC
Microsoft Security Response Center. Microsoft's Patch Tuesday advisories and KB-to-CVE mapping.
NVD
National Vulnerability Database (NIST). Authoritative CVE metadata and CVSS scores.
Ransomware
The vulnerability is linked to known ransomware activity.
Reference: Microsoft CVE and vulnerability management, the full CVE-to-patch lookup ranked by real-world risk, and the Microsoft patching guide, how Intune, Windows Autopatch, Defender, and Azure Update Manager fit together.
Data notice: this page, the feeds, and the API are provided as is, for informational purposes only, without warranty of any kind. Senserva, LLC does not guarantee the accuracy, completeness, or timeliness of third-party data (MSRC, NVD, CISA KEV, EPSS) and accepts no liability for actions taken based on it; verify against the authoritative vendor advisory before acting. Built daily with Senserva Trustworthy AI. All use of this data is subject to the Senserva EULA.