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

Exposure of sensitive system information to an unauthorized control sphere in Windows Cryptographic Services allows an authorized attacker to disclose information locally.

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

Integer overflow or wraparound in Windows PowerShell allows an authorized attacker to execute code locally.

Access of resource using incompatible type ('type confusion') in Windows SmartScreen allows an authorized attacker to elevate privileges locally.

Improper neutralization of special elements used in an sql command ('sql injection') in Microsoft Configuration Manager allows an authorized attacker to elevate privileges over an adjacent network.

Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.

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

Out-of-bounds read in Microsoft Windows Media Foundation allows an unauthorized attacker to disclose information locally.

Buffer over-read in Windows CD-ROM Driver allows an authorized attacker to disclose information locally.

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

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

Missing release of memory after effective lifetime in Remote Desktop Gateway Service allows an unauthorized attacker to deny service over a network.

Heap-based buffer overflow in Windows iSCSI allows an unauthorized attacker to deny service over a network.

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

Use after free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.

Use after free in Windows Netlogon allows an authorized attacker to deny service over a network.

Stack-based buffer overflow in Windows Internet Information Services allows an unauthorized attacker to execute code over a network.

Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.

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

Access of resource using incompatible type ('type confusion') in Windows Secure Kernel Mode allows an authorized attacker to disclose information locally.

Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to elevate privileges locally.

Use after free in Windows Cryptographic Services allows an authorized attacker to execute code over a network.

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

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

Out-of-bounds read in Windows IP Over USB Service allows an authorized attacker to disclose information locally.

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

Integer overflow or wraparound in Windows IP Over USB Service allows an authorized attacker to elevate privileges locally.

Out-of-bounds write in .NET Framework allows an unauthorized attacker to execute code over a network.

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

Weak authentication in Active Directory Federation Services (AD FS) allows an unauthorized attacker to bypass a security feature over a network.