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-2026-50328High· 7.5Windows Server Update Service (WSUS) Tampering Vulnerability
Uncaught exception in Windows Server Update Service allows an unauthorized attacker to perform tampering over a network.
CVE-2026-50327High· 7.8Windows Media Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Media allows an authorized attacker to execute code locally.
CVE-2026-50326High· 7.8Windows Unified Consent System Elevation of Privilege Vulnerability
Use after free in Windows Unified Consent System allows an authorized attacker to elevate privileges locally.
CVE-2026-50313High· 7.8Windows NTFS Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.
CVE-2026-50309High· 7.8Windows NTFS Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows NTFS allows an authorized attacker to execute code locally.
CVE-2026-50307High· 7.0Windows TCP/IP Elevation of Privilege Vulnerability
Use after free in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
CVE-2026-50306High· 7.8Windows TCP/IP Elevation of Privilege Vulnerability
Use after free in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
CVE-2026-50434Medium· 5.5Windows Push Notification Information Disclosure Vulnerability
Exposure of sensitive information to an unauthorized actor in Windows Push Notifications allows an authorized attacker to disclose information locally.
CVE-2026-50430Medium· 5.5Windows Push Notification Information Disclosure Vulnerability
Exposure of sensitive information to an unauthorized actor in Windows Push Notifications allows an authorized attacker to disclose information locally.
CVE-2026-50425High· 7.8Windows Internal System User Profile Elevation of Privilege Vulnerability
Use after free in Windows Internal System User Profile allows an authorized attacker to elevate privileges locally.
CVE-2026-50396High· 7.0Windows Kernel-Mode Driver Elevation of Privilege Vulnerability
Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.
CVE-2026-50390High· 7.0Access of resource using incompatible type ('type confusion') in Windows Kernel allows an authorized attacker to elevate privileges locally.
Access of resource using incompatible type ('type confusion') in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-50377Medium· 5.5Out-of-bounds read in Windows Kernel allows an authorized attacker to elevate privileges locally.
Out-of-bounds read in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-50357High· 7.8Windows Resilient File System (ReFS) Elevation of Privilege Vulnerability
Numeric truncation error in Windows Resilient File System (ReFS) allows an authorized attacker to execute code locally.
CVE-2026-50348High· 7.0Windows Runtime Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-50347High· 7.8Windows Data.dll Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Data dll allows an unauthorized attacker to execute code locally.
CVE-2026-50345High· 7.0Windows Runtime Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an authorized attacker to elevate privileges locally.
CVE-2026-50339Medium· 5.5Windows Push Notification Information Disclosure Vulnerability
Exposure of sensitive information to an unauthorized actor in Windows Push Notifications allows an authorized attacker to disclose information locally.
CVE-2026-50335High· 7.8Windows Operating Systems Elevation of Privilege Vulnerability
Improper access control in Windows Operating Systems allows an authorized attacker to elevate privileges locally.
CVE-2026-50330High· 7.5Windows Remote Desktop Client Elevation of Privilege Vulnerability
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-50315High· 7.8Windows Image Acquisition Elevation of Privilege Vulnerability
Null pointer dereference in Windows Image Acquisition allows an authorized attacker to elevate privileges locally.
CVE-2026-50312Medium· 4.7Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVE-2026-50310Medium· 4.7Windows Human Interface Device Information Disclosure Vulnerability
Integer overflow or wraparound in Windows Devices Human Interface allows an authorized attacker to disclose information locally.
CVE-2026-50460High· 8.1Windows Runtime Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-50452High· 7.0Windows Runtime Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-50449High· 7.0Windows Runtime Elevation of Privilege Vulnerability
Use after free in Windows Runtime allows an authorized attacker to elevate privileges locally.
CVE-2026-50428High· 7.1Windows Container Isolation FS Filter Driver (unionfs.sys) Information Disclosure Vulnerability
Out-of-bounds read in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to disclose information locally.
CVE-2026-50416Low· 3.3PoCWin32k Information Disclosure Vulnerability
Exposure of sensitive information to an unauthorized actor in Windows Win32K allows an authorized attacker to disclose information locally.
CVE-2026-50414High· 7.5Windows Media Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Media allows an authorized attacker to elevate privileges over a network.
CVE-2026-50410High· 7.0Windows Runtime Elevation of Privilege Vulnerability
Use after free in Windows Runtime allows an authorized attacker to elevate privileges locally.