Microsoft has 4,599 CVEs on record between 2012 and 2026. Disclosure cadence is accelerating: 2930 in the last 90 days against 932 in the 90 before. The busiest recent month was October 2026 with 1482. The median CVSS is 7.8 (high), with 273 rated critical. 2% have been exploited in the wild, in line with the corpus average. The median gap from publication to a KEV listing is 112 days (95 cases). The dominant weakness classes are CWE-122 (931) and CWE-416 (851). Most affected products: windows_10_1607 (988), Windows 10 Version 1607 (877), 365_apps (267).
CVEs per month
Last 12 months, by publish date
- Exploited share
- 2% vs 1% corpus
- Median CVSS
- 7.8
- Publish → KEV
- 112 d median(95)
- Last 90 days
- 2930 prev 932
Weakness classes
Products
- windows_10_1607 988
- Windows 10 Version 1607 877
- 365_apps 267
- Microsoft 365 Apps for Enterprise 232
- Windows 10 Version 1809 199
- windows_10_1809 174
Worst active — by depth score
CVE-2025-53770Critical· 9.8Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild. Microsoft is preparing…100CVE-2021-38647Critical· 9.8Open Management Infrastructure (OMI) Remote Code Execution Vulnerability100CVE-2021-34473Critical· 9.1Microsoft Exchange Server Remote Code Execution Vulnerability100CVE-2021-26855Critical· 9.1Microsoft Exchange Server Remote Code Execution Vulnerability100CVE-2020-0796Critical· 10.0A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka 'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'.100
Microsoft vulnerabilities
CVEs affecting Microsoft, newest first. Open any entry for full detail, references, and exploit status.
4599 CVEsRSS
CVE-2021-34520High· 8.10dayMicrosoft SharePoint Server Remote Code Execution Vulnerability
Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2021-34519Medium· 5.30dayMicrosoft SharePoint Server Information Disclosure Vulnerability
Microsoft SharePoint Server Information Disclosure Vulnerability
CVE-2021-34518High· 7.8Microsoft Excel Remote Code Execution Vulnerability
Microsoft Excel Remote Code Execution Vulnerability
CVE-2021-34517Medium· 5.3Microsoft SharePoint Server Spoofing Vulnerability
Microsoft SharePoint Server Spoofing Vulnerability
CVE-2021-34516High· 7.80dayWin32k Elevation of Privilege Vulnerability
Win32k Elevation of Privilege Vulnerability
CVE-2021-34514High· 7.8Windows Kernel Elevation of Privilege Vulnerability
Windows Kernel Elevation of Privilege Vulnerability
CVE-2021-34513High· 7.80dayWindows Storage Spaces Controller Elevation of Privilege Vulnerability
Windows Storage Spaces Controller Elevation of Privilege Vulnerability
CVE-2021-34512High· 7.80dayWindows Storage Spaces Controller Elevation of Privilege Vulnerability
Windows Storage Spaces Controller Elevation of Privilege Vulnerability
CVE-2021-34511High· 7.8Windows Installer Elevation of Privilege Vulnerability
Windows Installer Elevation of Privilege Vulnerability
CVE-2021-34510High· 7.80dayWindows Storage Spaces Controller Elevation of Privilege Vulnerability
Windows Storage Spaces Controller Elevation of Privilege Vulnerability
CVE-2021-34509Medium· 5.5Storage Spaces Controller Information Disclosure Vulnerability
Storage Spaces Controller Information Disclosure Vulnerability
CVE-2021-34508High· 8.8Windows Kernel Remote Code Execution Vulnerability
Windows Kernel Remote Code Execution Vulnerability
CVE-2021-34507Medium· 6.5Windows Remote Assistance Information Disclosure Vulnerability
Windows Remote Assistance Information Disclosure Vulnerability
CVE-2021-34504High· 7.8Windows Address Book Remote Code Execution Vulnerability
Windows Address Book Remote Code Execution Vulnerability
CVE-2021-34503High· 7.8Microsoft Windows Media Foundation Remote Code Execution Vulnerability
Microsoft Windows Media Foundation Remote Code Execution Vulnerability
CVE-2021-34501High· 7.80dayMicrosoft Excel Remote Code Execution Vulnerability
Microsoft Excel Remote Code Execution Vulnerability
CVE-2021-34500Medium· 6.3Windows Kernel Memory Information Disclosure Vulnerability
Windows Kernel Memory Information Disclosure Vulnerability
CVE-2021-34499Medium· 6.5Windows DNS Server Denial of Service Vulnerability
Windows DNS Server Denial of Service Vulnerability
CVE-2021-34498High· 7.80dayWindows GDI Elevation of Privilege Vulnerability
Windows GDI Elevation of Privilege Vulnerability
CVE-2021-34497Medium· 6.8Windows MSHTML Platform Remote Code Execution Vulnerability
Windows MSHTML Platform Remote Code Execution Vulnerability
CVE-2021-34496Medium· 5.5Windows GDI Information Disclosure Vulnerability
Windows GDI Information Disclosure Vulnerability
CVE-2021-34494High· 8.8Windows DNS Server Remote Code Execution Vulnerability
Windows DNS Server Remote Code Execution Vulnerability
CVE-2021-34493Medium· 6.7Windows Partition Management Driver Elevation of Privilege Vulnerability
Windows Partition Management Driver Elevation of Privilege Vulnerability
CVE-2021-34492High· 8.1Windows Certificate Spoofing Vulnerability
Windows Certificate Spoofing Vulnerability
CVE-2021-34491Medium· 5.5Win32k Information Disclosure Vulnerability
Win32k Information Disclosure Vulnerability
CVE-2021-34490High· 7.5Windows TCP/IP Driver Denial of Service Vulnerability
Windows TCP/IP Driver Denial of Service Vulnerability
CVE-2021-34489High· 7.8DirectWrite Remote Code Execution Vulnerability
DirectWrite Remote Code Execution Vulnerability
CVE-2021-34488High· 7.8Windows Console Driver Elevation of Privilege Vulnerability
Windows Console Driver Elevation of Privilege Vulnerability
CVE-2021-34479High· 7.8Microsoft Visual Studio Spoofing Vulnerability
Microsoft Visual Studio Spoofing Vulnerability
CVE-2021-34477High· 7.8Visual Studio Code .NET Runtime Elevation of Privilege Vulnerability
Visual Studio Code .NET Runtime Elevation of Privilege Vulnerability