Microsoft has 4,598 CVEs on record between 2012 and 2026. Disclosure cadence is accelerating: 2929 in the last 90 days against 934 in the 90 before. The busiest recent month was October 2026 with 1482. The median CVSS is 7.8 (high), with 272 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

1225/120126/010226/020326/030426/040526/050626/060726/070826/080926/091026/101126/11

Exploited share: 2% vs 1% corpus
Median CVSS: 7.8
Publish → KEV: 112 d median(95)
Last 90 days: 2929 prev 934

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

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4598

Total CVEs

272

Critical

CISA KEV

Exploited

Worst active — by depth score

Microsoft vulnerabilities

CVEs affecting Microsoft, newest first. Open any entry for full detail, references, and exploit status.

4598 CVEsRSS

CVEs per month

Weakness classes

Products

Worst active — by depth score

Microsoft vulnerabilities

Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.

Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

Use after free in Windows Management Services allows an authorized attacker to elevate privileges locally.

Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

Time-of-check time-of-use (toctou) race condition in Reliable Multicast Transport Driver (RMCAST) allows an authorized attacker to elevate privileges locally.

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Installer allows an authorized attacker to elevate privileges locally.

Weak authentication in Windows Kernel allows an authorized attacker to bypass a security feature over a network.

Improper access control in Windows Broadcast DVR User Service allows an authorized attacker to disclose information locally.

Double free in Windows Shell allows an unauthorized attacker to execute code over a network.

Buffer over-read in Windows USB Driver allows an authorized attacker to disclose information locally.

Use after free in Windows AppX Deployment Service allows an authorized attacker to elevate privileges locally.

Use after free in Windows Print Spooler Components allows an authorized attacker to elevate privileges locally.

Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.

Heap-based buffer overflow in Windows Distributed File System (DFS) allows an authorized attacker to execute code over a network.

Use after free in Windows Image Acquisition allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Windows Volume Manager Extension Driver allows an unauthorized attacker to execute code over a network.

Heap-based buffer overflow in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.

Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to execute code over a network.

Improper restriction of communication channel to intended endpoints in Azure Key Vault allows an authorized attacker to elevate privileges over a network.

Weak authentication in Azure Key Vault allows an unauthorized attacker to bypass a security feature over a network.

Time-of-check time-of-use (toctou) race condition in Windows BitLocker 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.

Exposure of private personal information to an unauthorized actor in Azure Active Directory allows an unauthorized attacker to disclose information locally.

Heap-based buffer overflow in Windows PCI Bus Driver allows an authorized attacker to elevate privileges locally.

Use after free in Windows Embedded Mode Service allows an authorized attacker to elevate privileges locally.

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Clipboard User Service allows an authorized attacker to elevate privileges locally.

Use after free in Windows StateRepository API allows an authorized attacker to elevate privileges locally.

Buffer over-read in Windows StateRepository API allows an authorized attacker to disclose information locally.

Out-of-bounds read in Windows Universal Disk Format File System Driver (UDFS) allows an authorized attacker to disclose information locally.

Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.