Microsoft Patch Tuesday
What Microsoft fixes on the second Tuesday of every month – straight from the official Security Update Guide: number of vulnerabilities, critical and already exploited ones (zero-days), affected products and the history of the last 24 months.
Patch Tuesday January 2026
112 of them published on Patch Tuesday (Tue, 13 Jan 2026), the rest added during the month. The month also contains 203 CVEs from other issuers that Microsoft ships in its own products (e.g. Chromium in Edge, Linux in Azure Linux) – they are not counted here. Microsoft Security Update Guide
Already exploited (zero-days)
Desktop Window Manager Information Disclosure Vulnerability
Windows, Windows ESU (Extended Security Updates) · KB5073723 KB5073457 KB5073724 KB5073379 · MSRC
Publicly disclosed beforehand
Secure Boot Certificate Expiration Security Feature Bypass Vulnerability
Windows, Windows ESU (Extended Security Updates) · KB5073723 KB5073457 KB5073724 KB5073379 · MSRC
Critical vulnerabilities (17)
Azure Resource Manager Elevation of Privilege Vulnerability
Azure · MSRC
Azure Front Door Elevation of Privilege Vulnerability
Azure · MSRC
Microsoft Account Spoofing Vulnerability
Azure · MSRC
Azure Entra ID Elevation of Privilege Vulnerability
Azure · MSRC
M365 Copilot Information Disclosure Vulnerability
Apps · MSRC
Microsoft Word Remote Code Execution Vulnerability
Microsoft Office · MSRC
Microsoft Office Remote Code Execution Vulnerability
Microsoft Office Remote Code Execution Vulnerability
Show 9 more
Azure Logic Apps Elevation of Privilege Vulnerability
Azure · MSRC
Windows Graphics Component Elevation of Privilege Vulnerability
Windows, Windows ESU (Extended Security Updates) · KB5073723 KB5073457 KB5073724 KB5073379 · MSRC
Microsoft Excel Remote Code Execution Vulnerability
Microsoft Excel Remote Code Execution Vulnerability
Windows Local Security Authority Subsystem Service (LSASS) Remote Code Execution Vulnerability
Copilot Studio Information Disclosure Vulnerability
Microsoft Office · MSRC
Word Copilot Information Disclosure Vulnerability
Apps · MSRC
Azure Data Explorer Information Disclosure Vulnerability
Azure · MSRC
Windows Virtualization-Based Security (VBS) Enclave Elevation of Privilege Vulnerability
Exploitation more likely according to Microsoft
Windows Installer Elevation of Privilege Vulnerability
Windows, Windows ESU (Extended Security Updates) · KB5073723 KB5073457 KB5073724 KB5073379 · MSRC
Windows Error Reporting Service Elevation of Privilege Vulnerability
Windows, Windows ESU (Extended Security Updates) · KB5073457 KB5073724 KB5073379 KB5074109 · MSRC
Windows Common Log File System Driver Elevation of Privilege Vulnerability
Windows, Windows ESU (Extended Security Updates) · KB5073457 KB5073723 KB5073724 KB5073379 · MSRC
Windows NTFS Remote Code Execution Vulnerability
Windows, Windows ESU (Extended Security Updates) · KB5073723 KB5073457 KB5073724 KB5073379 · MSRC
Windows Routing and Remote Access Service (RRAS) Elevation of Privilege Vulnerability
Windows, Windows ESU (Extended Security Updates) · KB5073723 KB5073457 KB5073724 KB5073379 · MSRC
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Windows, Windows ESU (Extended Security Updates) · KB5073723 KB5073457 KB5073724 KB5073379 · MSRC
Show 2 more
Desktop Window Manager Elevation of Privilege Vulnerability
Windows, Windows ESU (Extended Security Updates) · KB5073457 KB5073724 KB5073379 KB5074109 · MSRC
Windows NTFS Remote Code Execution Vulnerability
Windows, Windows ESU (Extended Security Updates) · KB5073457 KB5073724 KB5073723 KB5073379 · MSRC
Show all 124 CVEs of this month
History of the last 24 months
- Critical
- High
- Medium
- Low
- exploited (zero-day)
Number of Microsoft CVEs per Patch Tuesday by severity; the red dot shows the number of vulnerabilities already exploited. Click a month for the details.
| Month | CVE | Critical | Exploited (zero-day) | Publicly disclosed | Highest CVSS |
|---|---|---|---|---|---|
| October 2026 | 1,475 | 94 | 1 | 1 | 10.0 |
| September 2026 | 998 | 131 | 2 | 0 | 10.0 |
| August 2026 | 457 | 84 | 1 | 3 | 10.0 |
| July 2026 | 663 | 75 | 3 | 1 | 10.0 |
| June 2026 | 220 | 49 | 0 | 4 | 10.0 |
| May 2026 | 162 | 46 | 3 | 3 | 10.0 |
| April 2026 | 181 | 23 | 2 | 1 | 10.0 |
| March 2026 | 97 | 19 | 0 | 2 | 10.0 |
| February 2026 | 61 | 7 | 6 | 3 | 9.8 |
| January 2026 | 124 | 17 | 2 | 1 | 9.9 |
| December 2025 | 65 | 8 | 1 | 2 | 10.0 |
| November 2025 | 71 | 12 | 1 | 0 | 10.0 |
| October 2025 | 180 | 18 | 2 | 1 | 10.0 |
| September 2025 | 94 | 13 | 0 | 1 | 10.0 |
| August 2025 | 116 | 19 | 0 | 1 | 10.0 |
| July 2025 | 137 | 17 | 1 | 1 | 9.9 |
| June 2025 | 72 | 13 | 1 | 1 | 9.8 |
| May 2025 | 80 | 11 | 5 | 2 | 10.0 |
| April 2025 | 132 | 17 | 1 | 0 | 9.9 |
| March 2025 | 65 | 10 | 6 | 1 | 9.3 |
| February 2025 | 66 | 6 | 3 | 2 | 9.0 |
| January 2025 | 165 | 13 | 3 | 5 | 9.9 |
| December 2024 | 75 | 19 | 1 | 1 | 9.8 |
| November 2024 | 97 | 7 | 3 | 3 | 9.9 |
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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