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

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: 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

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4599

Total CVEs

273

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.

4599 CVEsRSS

CVEs per month

Weakness classes

Products

Worst active — by depth score

Microsoft vulnerabilities

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

Exposure of sensitive system information to an unauthorized control sphere in Windows Win32K allows an authorized attacker to disclose information locally.

Heap-based buffer overflow in Windows Shell allows an unauthorized attacker to execute code over a network.

Concurrent execution using shared resource with improper synchronization ('race condition') in DNS Server allows an unauthorized attacker to execute code over a network.

Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate privileges over a network.

Integer underflow (wrap or wraparound) in Microsoft Standard XPS allows an unauthorized attacker to execute code over a network.

Numeric truncation error in Windows Kerberos allows an authorized attacker to elevate privileges locally.

Improper encoding or escaping of output in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges locally.

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

Out-of-bounds write in RPC Runtime allows an unauthorized attacker to execute code over a network.

Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.

Use after free in Windows Bluetooth Port Driver allows an authorized attacker to elevate privileges locally.

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

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

Use after free in Windows DNS allows an unauthorized attacker to execute code over a network.

Missing release of memory after effective lifetime in Active Directory Domain Services allows an unauthorized attacker to deny service over a network.

Out-of-bounds read in Windows Win32K allows an authorized attacker to disclose information locally.

Improper limitation of a pathname to a restricted directory ('path traversal') in Windows PowerShell allows an authorized attacker to elevate privileges over a network.

Exposure of sensitive information to an unauthorized actor in .NET allows an authorized attacker to elevate privileges locally.

External control of file name or path in .NET allows an unauthorized attacker to elevate privileges over a network.

Time-of-check time-of-use (toctou) race condition in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Out-of-bounds read in Windows DHCP Server allows an unauthorized attacker to disclose information over a network.

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

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

Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.

Buffer over-read in Windows Encrypting File System (EFS) allows an authorized attacker to disclose information locally.

Improper validation of consistency within input in Windows TCP/IP allows an unauthorized attacker to bypass a security feature over a network.

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K allows an authorized attacker to bypass a security feature locally.

Use after free in Windows Device Association Service allows an authorized attacker to elevate privileges locally.

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