Microsoft January 2026 Patch Tuesday: 115 Vulnerabilities Fixed

Microsoft kicks off 2026 with 115 security updates, including a fix for an actively exploited zero-day. Protect your Windows and Office systems today.

Microsoft has released its first Patch Tuesday of 2026, delivering a massive wave of security fixes to protect users from various digital threats. This month, the tech giant addressed 115 vulnerabilities, out of which eight are considered Critical, the highest risk level, while 106 are labelled Important.

For those unfamiliar with the term, Patch Tuesday is the day Microsoft regularly releases updates to fix security holes. This January, the updates cover everything from Windows 11 and Microsoft Office to the Edge browser.

Zero-Day Threats and Active Risks

One of the most pressing issues is the fix for three zero-day vulnerabilities, which refer to flaws discovered before a fix was ready. These include:

CVE-2026-20805 (Desktop Window Manager): According to data from research firms like Qualys and CrowdStrike, this ...