What was in the January 2026 Microsoft Patch Tuesday?

Microsoft released 27 updates fixing 109 CVEs in January 2026, of which 3 were actively exploited (CISA KEV).

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Home › Microsoft Patch Tuesday › January 2026

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Microsoft Patch Tuesday, January 2026

Released January 13, 2026 · data last refreshed 2026-07-09

Microsoft's January 2026 security release, published January 13, 2026: 27 updates fixing 109 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)

109

CVEs fixed

Actively exploited

Critical updates

Actively exploited CVEs (CISA KEV)

CVE-2026-20963Microsoft SharePoint Remote Code Execution VulnerabilityCVSS 9.8Exploited

CVE-2026-21509Microsoft Office Security Feature Bypass VulnerabilityCVSS 7.8Exploited

CVE-2026-20805Desktop Window Manager Information Disclosure VulnerabilityCVSS 5.5Exploited Hot now

Other high-risk CVEs (CVSS 8.8+)

CVE-2025-6965Integer Truncation on SQLiteCVSS 9.8

CVE-2026-20868Windows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityCVSS 8.8

CVE-2026-20947Microsoft SharePoint Server Remote Code Execution VulnerabilityCVSS 8.8

Products fixed this month

Windows 10 Version 1809 for 32-bit Systems (10)Windows 11 Version 25H2 for x64-based Systems (7)Windows 11 Version 25H2 for ARM64-based Systems (7)Windows Server 2019 (7)Microsoft SharePoint Server 2019 (7)Microsoft Office 2019 for 32-bit editions (4)Microsoft Office 2016 (32-bit edition) (4)Microsoft Office 2016 (64-bit edition) (4)Windows Server 2019 (Server Core installation) (4)Windows Server 2022 (4)

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I manage Microsoft patching. Facts from the January 2026 Microsoft Patch Tuesday (source: https://senserva.com/patch-tuesday-2026-01, part of the Senserva Patch Tuesday archive at https://senserva.com/patch-tuesday.html): 27 updates (KBs) fixing 109 CVEs, 3 actively exploited (CISA KEV), 0 ransomware-linked, 11 Critical updates.
Actively exploited CVEs: CVE-2026-20963 (CVSS 9.8), CVE-2026-21509 (CVSS 7.8), CVE-2026-20805 (CVSS 5.5).
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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