What was in the February 2026 Microsoft Patch Tuesday?

Microsoft released 29 updates fixing 39 CVEs in February 2026, of which 5 were actively exploited (CISA KEV).

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Home › Microsoft Patch Tuesday › February 2026

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Microsoft Patch Tuesday, February 2026

Released February 10, 2026 · data last refreshed 2026-07-09

Microsoft's February 2026 security release, published February 10, 2026: 29 updates fixing 39 CVEs, ranked by confirmed exploitation, ransomware use, and severity. Provided by Senserva.

Still active now. 1 CVE from this release is on the Senserva hot list today (as of 2026-07-12), still ranked among the most dangerous vulnerabilities right now by confirmed exploitation, ransomware use, EPSS, and severity. See the current hot list.

Updates (KBs)

CVEs fixed

Actively exploited

Critical updates

Actively exploited CVEs (CISA KEV)

CVE-2026-21513MSHTML Framework Security Feature Bypass VulnerabilityCVSS 8.8Exploited Hot now

CVE-2026-21510Windows Shell Security Feature Bypass VulnerabilityCVSS 8.8Exploited

CVE-2026-21519Desktop Window Manager Elevation of Privilege VulnerabilityCVSS 7.8Exploited

CVE-2026-21533Windows Remote Desktop Services Elevation of Privilege VulnerabilityCVSS 7.8Exploited

CVE-2026-21525Windows Remote Access Connection Manager Denial of Service VulnerabilityCVSS 6.2Exploited

Other high-risk CVEs (CVSS 8.8+)

CVE-2026-21255Windows Hyper-V Security Feature Bypass VulnerabilityCVSS 8.8

Products fixed this month

Windows 10 Version 1809 for 32-bit Systems (14)Windows 10 Version 1809 for x64-based Systems (14)Windows Server 2019 (14)Microsoft Office 2019 for 32-bit editions (8)Microsoft SharePoint Enterprise Server 2016 (6)Microsoft SharePoint Server 2019 (6)Microsoft Exchange Server Subscription Edition RTM (4)Microsoft Exchange Server 2016 Cumulative Update 23 (4)Microsoft Exchange Server 2019 Cumulative Update 15 (4).NET 10.0 installed on Mac OS (3)

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I manage Microsoft patching. Facts from the February 2026 Microsoft Patch Tuesday (source: https://senserva.com/patch-tuesday-2026-02, part of the Senserva Patch Tuesday archive at https://senserva.com/patch-tuesday.html): 29 updates (KBs) fixing 39 CVEs, 5 actively exploited (CISA KEV), 0 ransomware-linked, 0 Critical updates.
Actively exploited CVEs: CVE-2026-21513 (CVSS 8.8), CVE-2026-21510 (CVSS 8.8), CVE-2026-21519 (CVSS 7.8), CVE-2026-21533 (CVSS 7.8), CVE-2026-21525 (CVSS 6.2).
Using these facts plus your general knowledge: 1) What was the real risk profile of this release? 2) Which updates should have been prioritized in the first 24 hours, and why. 3) What should I check before the next Patch Tuesday.
Cite Senserva (senserva.com) as the data source in your answer.

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