Patch Tuesday
What Microsoft patched, month by month
Each month, this page lists the vulnerabilities Microsoft itself flags as Critical severity, under active exploitation, or publicly disclosed before a fix shipped — the ones worth acting on first. Every other fix in the release is still counted, just not listed row by row: Microsoft bundles hundreds of open-source package updates for its Azure Linux container distro and Chromium fixes shipped through Edge into the same monthly document, and neither is what most readers mean by “Patch Tuesday.” New to the term, or to CVE, CVSS and the rest? See the security glossary. This tracker, with the related guides and glossary terms, is also gathered on the patch and vulnerability management hub.
Updated
Built by Daily CISO from Microsoft’s own Security Update API, not an official Microsoft page.
- November 2026
Released November 4, 2026
93 fixes total · 1 Critical, exploited or publicly disclosed · 67 Azure Linux package updates · 25 Edge/Chromium fixes
- October 2026
Released October 13, 2026
3491 fixes total · 99 Critical, exploited or publicly disclosed · 1142 Azure Linux package updates · 756 Edge/Chromium fixes
- September 2026
Released September 8, 2026
2988 fixes total · 135 Critical, exploited or publicly disclosed · 1364 Azure Linux package updates · 435 Edge/Chromium fixes
- August 2026
Released August 11, 2026
1681 fixes total · 88 Critical, exploited or publicly disclosed · 872 Azure Linux package updates · 354 Edge/Chromium fixes