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-2021-34476High· 7.5Bowser.sys Denial of Service Vulnerability
Bowser.sys Denial of Service Vulnerability
CVE-2021-34474High· 8.0Microsoft Dynamics 365 Business Central Remote Code Execution Vulnerability
Microsoft Dynamics 365 Business Central Remote Code Execution Vulnerability
CVE-2021-34473Critical· 9.1CISA KEV0dayPoCMicrosoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-34470High· 8.0PoCMicrosoft Exchange Server Elevation of Privilege Vulnerability
Microsoft Exchange Server Elevation of Privilege Vulnerability
CVE-2021-34469High· 8.2Microsoft Office Security Feature Bypass Vulnerability
Microsoft Office Security Feature Bypass Vulnerability
CVE-2021-34468High· 7.10dayMicrosoft SharePoint Server Remote Code Execution Vulnerability
Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2021-33788High· 7.5Windows LSA Denial of Service Vulnerability
Windows LSA Denial of Service Vulnerability
CVE-2021-33786High· 8.1Windows LSA Security Feature Bypass Vulnerability
Windows LSA Security Feature Bypass Vulnerability
CVE-2021-33785High· 7.5Windows AF_UNIX Socket Provider Denial of Service Vulnerability
Windows AF_UNIX Socket Provider Denial of Service Vulnerability
CVE-2021-33784High· 7.8Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
CVE-2021-33783Medium· 6.5Windows SMB Information Disclosure Vulnerability
Windows SMB Information Disclosure Vulnerability
CVE-2021-33782Medium· 5.5Windows Authenticode Spoofing Vulnerability
Windows Authenticode Spoofing Vulnerability
CVE-2021-33781High· 8.1Azure AD Security Feature Bypass Vulnerability
Azure AD Security Feature Bypass Vulnerability
CVE-2021-33780High· 8.8Windows DNS Server Remote Code Execution Vulnerability
Windows DNS Server Remote Code Execution Vulnerability
CVE-2021-33779High· 8.1Windows AD FS Security Feature Bypass Vulnerability
Windows AD FS Security Feature Bypass Vulnerability
CVE-2021-33778High· 7.8HEVC Video Extensions Remote Code Execution Vulnerability
HEVC Video Extensions Remote Code Execution Vulnerability
CVE-2021-33777High· 7.8HEVC Video Extensions Remote Code Execution Vulnerability
HEVC Video Extensions Remote Code Execution Vulnerability
CVE-2021-33776High· 7.8HEVC Video Extensions Remote Code Execution Vulnerability
HEVC Video Extensions Remote Code Execution Vulnerability
CVE-2021-33775High· 7.8HEVC Video Extensions Remote Code Execution Vulnerability
HEVC Video Extensions Remote Code Execution Vulnerability
CVE-2021-33774High· 7.0Windows Event Tracing Elevation of Privilege Vulnerability
Windows Event Tracing Elevation of Privilege Vulnerability
CVE-2021-33773High· 7.8Windows Remote Access Connection Manager Elevation of Privilege Vulnerability
Windows Remote Access Connection Manager Elevation of Privilege Vulnerability
CVE-2021-33772High· 7.5Windows TCP/IP Driver Denial of Service Vulnerability
Windows TCP/IP Driver Denial of Service Vulnerability
CVE-2021-33771High· 7.8CISA KEV0dayWindows Kernel Elevation of Privilege Vulnerability
Windows Kernel Elevation of Privilege Vulnerability
CVE-2021-33768High· 8.0Microsoft Exchange Server Elevation of Privilege Vulnerability
Microsoft Exchange Server Elevation of Privilege Vulnerability
CVE-2021-33767High· 8.2Open Enclave SDK Elevation of Privilege Vulnerability
Open Enclave SDK Elevation of Privilege Vulnerability
CVE-2021-33766High· 7.3CISA KEV0dayPoCMicrosoft Exchange Server Information Disclosure Vulnerability
Microsoft Exchange Server Information Disclosure Vulnerability
CVE-2021-33765Medium· 6.2Windows Installer Spoofing Vulnerability
Windows Installer Spoofing Vulnerability
CVE-2021-33764Medium· 5.9Windows Key Distribution Center Information Disclosure Vulnerability
Windows Key Distribution Center Information Disclosure Vulnerability
CVE-2021-33763Medium· 5.5Windows Remote Access Connection Manager Information Disclosure Vulnerability
Windows Remote Access Connection Manager Information Disclosure Vulnerability
CVE-2021-33761High· 7.8Windows Remote Access Connection Manager Elevation of Privilege Vulnerability
Windows Remote Access Connection Manager Elevation of Privilege Vulnerability