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

Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to disclose information over a network.

Double free in Windows Update Orchestrator Service allows an authorized attacker to elevate privileges locally.

Double free in OpenSSH for Windows allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.

Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.

Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.

Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.

Out-of-bounds read in Windows Partition Management Driver allows an unauthorized attacker to execute code over a network.

Heap-based buffer overflow in HID class driver allows an authorized attacker to elevate privileges locally.

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

Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to perform tampering over a network.

Incorrect permission assignment for critical resource in Windows Mobile Broadband allows an authorized attacker to elevate privileges locally.

Improper verification of cryptographic signature in Windows Audio Service allows an authorized attacker to elevate privileges locally.

Improper neutralization of argument delimiters in a command ('argument injection') in Windows Error Reporting allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

Missing authentication for critical function in Windows Setup and Deployment allows an authorized attacker to elevate privileges locally.

Improper access control in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

Improper link resolution before file access ('link following') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to perform tampering locally.

Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

Observable discrepancy in Active Directory Federation Services (AD FS) allows an unauthorized attacker to disclose information over a network.

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

Observable discrepancy in Microsoft Office SharePoint allows an authorized attacker to perform tampering over a network.

Improper neutralization of special elements used in a command ('command injection') in Microsoft Office OneNote allows an unauthorized attacker to execute code over a network.

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.