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 Microsoft Office allows an unauthorized attacker to execute code locally.

Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Out-of-bounds write in Azure Monitor Agent allows an authorized attacker to execute code over a network.

Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.

Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.

Relative path traversal in Microsoft Office Access allows an unauthorized attacker to execute code locally.

Untrusted pointer dereference in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.

Improper access control in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.

Buffer over-read in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to disclose information over a network.

Use of uninitialized resource in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

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

Integer overflow or wraparound in Windows Projected File System allows an authorized attacker to elevate privileges locally.

Null pointer dereference in Windows Client-Side Caching (CSC) Service allows an authorized attacker to elevate privileges locally.

Buffer over-read in Windows Projected File System allows an authorized attacker to elevate privileges locally.

Null pointer dereference in Windows DirectX allows an authorized attacker to deny service locally.

Buffer over-read in Windows Projected File System allows an authorized attacker to elevate privileges locally.

Buffer over-read in Windows Projected File System Filter Driver allows an authorized attacker to elevate privileges locally.

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

Out-of-bounds read in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

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

Improper access control in Windows Storage VSP Driver allows an authorized attacker to elevate privileges locally.

Missing authentication for critical function in Windows Storage VSP Driver allows an authorized attacker to elevate privileges locally.

Out-of-bounds read in Windows Projected File System allows an authorized attacker to elevate privileges locally.

Improper neutralization of special elements used in a command ('command injection') in Windows PowerShell allows an unauthorized attacker to execute code locally.

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

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

Improper input validation in Windows Message Queuing allows an authorized attacker to elevate privileges locally.