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

Integer underflow (wrap or wraparound) in Windows Failover Cluster allows an unauthorized attacker to deny service over a network.

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

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

Untrusted pointer dereference in Windows Storage Port Driver allows an unauthorized attacker to elevate privileges with a physical attack.

Use of uninitialized resource in Windows Kernel allows an authorized attacker to disclose information locally.

Untrusted pointer dereference in Windows Network File System allows an authorized attacker to disclose information locally.

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

Heap-based buffer overflow in Network Policy Server (NPS) allows an unauthorized attacker to execute code over a network.

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

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

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

Improper privilege management in Windows Group Policy allows an authorized attacker to elevate privileges locally.

Stack-based buffer overflow in Windows Storage allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code locally.

Deserialization of untrusted data in Dynamics Business Central allows an authorized attacker to execute code over a network.

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

Use after free 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.

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

Improper neutralization of special elements used in an os command ('os command injection') in Azure CycleCloud allows an authorized attacker to execute code locally.

Untrusted pointer dereference in SysInternals allows an authorized attacker to elevate privileges locally.

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

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

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

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

Improper certificate validation in Microsoft Partner Center allows an unauthorized attacker to elevate privileges over a network.

Authorization bypass through user-controlled key in Microsoft Bookings allows an unauthorized attacker to elevate privileges over a network.

Deserialization of untrusted data in Microsoft Dataverse allows an unauthorized attacker to execute code over a network.

Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.

Exposure of sensitive information to an unauthorized actor in Azure API Center allows an unauthorized attacker to disclose information over a network.