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

Incorrect calculation of buffer size in Windows iSCSI allows an unauthorized attacker to execute code over a network.

Use after free in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.

Use after free in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to execute code over a network.

Heap-based buffer overflow in Microsoft Local Security Authority Server (lsasrv) allows an authorized attacker to elevate privileges locally.

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

Heap-based buffer overflow in Windows Universal Disk Format File System Driver (UDFS) allows an authorized attacker to elevate privileges locally.

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

Remote Code Execution in Windows Routing and Remote Access Service (RRAS) allows attacker to gain an unauthorized access to victim's machine

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

Missing release of memory after effective lifetime in Windows TCP/IP allows an unauthorized attacker to deny service over a network.

Null pointer dereference in Windows IKE Extension allows an unauthorized attacker to deny service over a network.

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

Incorrect type conversion or cast in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

Integer overflow or wraparound in Windows USB Video Driver allows an authorized attacker to elevate privileges locally.

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

Buffer over-read in Windows Volume Manager Extension Driver allows an authorized attacker to elevate privileges locally.

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

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

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

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

Use after free in Graphic Fonts allows an authorized attacker to elevate privileges locally.

Use after free in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.

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

Use after free in Windows Universal Disk Format File System Driver (UDFS) allows an authorized attacker to elevate privileges locally.

Out-of-bounds read in Windows SMB Client allows an authorized attacker to disclose information over a network.

Heap-based buffer overflow in Windows USB Audio Class driver (usbaudio.sys) allows an authorized attacker to elevate privileges locally.

Untrusted pointer dereference in Windows Print Spooler Components allows an authorized attacker to deny service over a network.

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

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

Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code with a physical attack.