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-2026-26163High· 7.8Double free in Windows Kernel allows an authorized attacker to elevate privileges locally.
Double free in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-26177High· 7.0Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVE-2026-26176High· 7.8Heap-based buffer overflow in Windows Client Side Caching driver (csc.sys) allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Client Side Caching driver (csc.sys) allows an authorized attacker to elevate privileges locally.
CVE-2026-26170High· 7.8Improper input validation in Microsoft PowerShell allows an authorized attacker to elevate privileges locally.
Improper input validation in Microsoft PowerShell allows an authorized attacker to elevate privileges locally.
CVE-2026-26182High· 7.0Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVE-2026-26178High· 8.8Integer size truncation in Windows Advanced Rasterization Platform (WARP) allows an unauthorized attacker to elevate privileges locally.
Integer size truncation in Windows Advanced Rasterization Platform (WARP) allows an unauthorized attacker to elevate privileges locally.
CVE-2026-26172High· 7.8Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
CVE-2026-27911High· 7.8Concurrent execution using shared resource with improper synchronization ('race condition') in Windows User Interface Core allows an authorized attacker to elevate privileges locally.
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows User Interface Core allows an authorized attacker to elevate privileges locally.
CVE-2026-26184High· 7.8Buffer over-read in Windows Projected File System allows an authorized attacker to elevate privileges locally.
Buffer over-read in Windows Projected File System allows an authorized attacker to elevate privileges locally.
CVE-2026-27913High· 7.7Windows BitLocker Security Feature Bypass Vulnerability
Improper input validation in Windows BitLocker allows an unauthorized attacker to bypass a security feature locally.
CVE-2026-27910High· 7.8Improper handling of insufficient permissions or privileges in Windows Installer allows an authorized attacker to elevate privileges locally.
Improper handling of insufficient permissions or privileges in Windows Installer allows an authorized attacker to elevate privileges locally.
CVE-2026-27909High· 7.8Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.
Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.
CVE-2026-27920High· 7.8Untrusted pointer dereference in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.
Untrusted pointer dereference in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.
CVE-2026-27914High· 7.8Improper access control in Microsoft Management Console allows an authorized attacker to elevate privileges locally.
Improper access control in Microsoft Management Console allows an authorized attacker to elevate privileges locally.
CVE-2026-27912High· 8.0PoCWindows Kerberos Elevation of Privilege Vulnerability
Improper authorization in Windows Kerberos allows an authorized attacker to elevate privileges over an adjacent network.
CVE-2026-27928High· 8.7Windows Hello Security Feature Bypass Vulnerability
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
CVE-2026-27922High· 7.0Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVE-2026-27916High· 7.8Use after free in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.
Use after free in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.
CVE-2026-27930Medium· 5.5Out-of-bounds read in Windows GDI allows an unauthorized attacker to disclose information locally.
Out-of-bounds read in Windows GDI allows an unauthorized attacker to disclose information locally.
CVE-2026-27925Medium· 6.5Use after free in Windows Universal Plug and Play (UPnP) Device Host allows an unauthorized attacker to disclose information over an adjacent network.
Use after free in Windows Universal Plug and Play (UPnP) Device Host allows an unauthorized attacker to disclose information over an adjacent network.
CVE-2026-27923High· 7.8Use after free in Desktop Window Manager allows an authorized attacker to elevate privileges locally.
Use after free in Desktop Window Manager allows an authorized attacker to elevate privileges locally.
CVE-2026-32069High· 7.8Double free in Windows Projected File System allows an authorized attacker to elevate privileges locally.
Double free in Windows Projected File System allows an authorized attacker to elevate privileges locally.
CVE-2026-32068High· 7.0Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SSDP Service allows an authorized attacker to elevate privileges locally.
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows SSDP Service allows an authorized attacker to elevate privileges locally.
CVE-2026-32076High· 7.8Out-of-bounds read in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.
Out-of-bounds read in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.
CVE-2026-32074High· 7.8Double free in Windows Projected File System allows an authorized attacker to elevate privileges locally.
Double free in Windows Projected File System allows an authorized attacker to elevate privileges locally.
CVE-2026-32070High· 7.0Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.
CVE-2026-32077High· 7.8Untrusted pointer dereference in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.
Untrusted pointer dereference in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.
CVE-2026-32072Medium· 6.2Improper authentication in Windows Active Directory allows an unauthorized attacker to perform spoofing locally.
Improper authentication in Windows Active Directory allows an unauthorized attacker to perform spoofing locally.
CVE-2026-32084Medium· 5.5Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.
Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.
CVE-2026-32080High· 7.0Windows WalletService Elevation of Privilege Vulnerability
Use after free in Windows WalletService allows an authorized attacker to elevate privileges locally.