Microsoft has 4,599 CVEs on record between 2012 and 2026. Disclosure cadence is accelerating: 2930 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 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 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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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 Overlay Filter allows an authorized attacker to elevate privileges locally.

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

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

Absolute path traversal in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.

Use after free in Internet Explorer allows an authorized attacker to elevate privileges locally.

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

Use after free in Windows Bluetooth Service allows an unauthorized attacker to execute code over an adjacent network.

Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

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

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

Release of invalid pointer or reference in Windows Kernel allows an authorized attacker to elevate privileges locally.

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

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

Improper validation of syntactic correctness of input in Windows Hyper-V allows an authorized attacker to perform spoofing locally.

Buffer over-read in Windows Overlay Filter allows an authorized attacker to elevate privileges locally.

Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

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

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

Use of uninitialized resource in Windows Event Logging Service allows an authorized attacker to disclose information locally.

Use after free in Microsoft Local Security Authority Server (lsasrv) allows an authorized attacker to elevate privileges locally.

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

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

Buffer over-read in Servicing Stack Updates allows an authorized attacker to disclose information locally.

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

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

Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.

Missing authentication for critical function in Windows Error Reporting allows an authorized attacker to perform tampering locally.

Use of uninitialized resource in Windows HTTP.sys 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.

Out-of-bounds write in Windows NTFS allows an authorized attacker to execute code locally.