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
- 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
Worst active — by depth score
CVE-2025-53770Critical· 9.8Deserialization of untrusted data in on-premises Microsoft SharePoint Server allows an unauthorized attacker to execute code over a network. Microsoft is aware that an exploit for CVE-2025-53770 exists in the wild. Microsoft is preparing…100CVE-2021-38647Critical· 9.8Open Management Infrastructure (OMI) Remote Code Execution Vulnerability100CVE-2021-34473Critical· 9.1Microsoft Exchange Server Remote Code Execution Vulnerability100CVE-2021-26855Critical· 9.1Microsoft Exchange Server Remote Code Execution Vulnerability100CVE-2020-0796Critical· 10.0A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka 'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'.100
Microsoft vulnerabilities
CVEs affecting Microsoft, newest first. Open any entry for full detail, references, and exploit status.
4599 CVEsRSS
CVE-2026-83903High· 7.8Heap-based buffer overflow in Windows Direct Composition allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Direct Composition allows an authorized attacker to elevate privileges locally.
CVE-2026-83902High· 7.8Heap-based buffer overflow in Windows Direct Composition allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Direct Composition allows an authorized attacker to elevate privileges locally.
CVE-2026-83901High· 7.0Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
CVE-2026-83900High· 7.0Use after free in Windows Bind Filter Driver allows an authorized attacker to elevate privileges locally.
Use after free in Windows Bind Filter Driver allows an authorized attacker to elevate privileges locally.
CVE-2026-83899High· 7.0Improper privilege management in Windows Installer allows an authorized attacker to elevate privileges locally.
Improper privilege management in Windows Installer allows an authorized attacker to elevate privileges locally.
CVE-2026-83898Medium· 5.5Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information locally.
Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information locally.
CVE-2026-83897Medium· 4.7Exposure of sensitive system information to an unauthorized control sphere in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
Exposure of sensitive system information to an unauthorized control sphere in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
CVE-2026-83896High· 7.8Heap-based buffer overflow in Windows Direct Composition allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Direct Composition allows an authorized attacker to elevate privileges locally.
CVE-2026-83895Medium· 6.8Heap-based buffer overflow in Windows Win32 Kernel Subsystem allows an unauthorized attacker to elevate privileges with a physical attack.
Heap-based buffer overflow in Windows Win32 Kernel Subsystem allows an unauthorized attacker to elevate privileges with a physical attack.
CVE-2026-83893Medium· 5.5Exposure of sensitive system information to an unauthorized control sphere in Windows Clipboard User Service allows an authorized attacker to disclose information locally.
Exposure of sensitive system information to an unauthorized control sphere in Windows Clipboard User Service allows an authorized attacker to disclose information locally.
CVE-2026-83892Medium· 5.5Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information locally.
Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information locally.
CVE-2026-83891High· 8.8Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
CVE-2026-83889High· 8.8Release of invalid pointer or reference in DNS Server allows an authorized attacker to execute code over a network.
Release of invalid pointer or reference in DNS Server allows an authorized attacker to execute code over a network.
CVE-2026-83888Medium· 6.5Buffer over-read in Windows CD-ROM Driver allows an unauthorized attacker to elevate privileges over a network.
Buffer over-read in Windows CD-ROM Driver allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-83887Medium· 5.5Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information locally.
Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information locally.
CVE-2026-83886High· 7.0Use after free in Windows Update Orchestrator Service allows an authorized attacker to elevate privileges locally.
Use after free in Windows Update Orchestrator Service allows an authorized attacker to elevate privileges locally.
CVE-2026-83885Medium· 5.6Inadequate encryption strength in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to perform spoofing locally.
Inadequate encryption strength in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to perform spoofing locally.
CVE-2026-83884Medium· 5.5Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information locally.
Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information locally.
CVE-2026-83883High· 7.8Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
CVE-2026-83882High· 7.8Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-83881High· 7.8Heap-based buffer overflow in Windows exFAT File System allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows exFAT File System allows an authorized attacker to elevate privileges locally.
CVE-2026-83879High· 7.0Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Overlay Filter allows an authorized attacker to elevate privileges locally.
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Overlay Filter allows an authorized attacker to elevate privileges locally.
CVE-2026-83877High· 7.8Integer overflow or wraparound in HID Parser Library allows an authorized attacker to elevate privileges locally.
Integer overflow or wraparound in HID Parser Library allows an authorized attacker to elevate privileges locally.
CVE-2026-83876High· 7.8Use after free in Windows Shell allows an authorized attacker to elevate privileges locally.
Use after free in Windows Shell allows an authorized attacker to elevate privileges locally.
CVE-2026-83875Medium· 5.5Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information locally.
Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information locally.
CVE-2026-83874High· 8.8Heap-based buffer overflow in Windows Event Tracing allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Windows Event Tracing allows an unauthorized attacker to execute code over a network.
CVE-2026-83873High· 7.8Relative path traversal in Windows Shell allows an authorized attacker to elevate privileges locally.
Relative path traversal in Windows Shell allows an authorized attacker to elevate privileges locally.
CVE-2026-83872High· 7.8Incorrect conversion between numeric types in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
Incorrect conversion between numeric types in Windows TCP/IP allows an authorized attacker to elevate privileges locally.
CVE-2026-83871High· 7.0Heap-based buffer overflow in OpenSSH for Windows allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in OpenSSH for Windows allows an authorized attacker to elevate privileges locally.
CVE-2026-83870Medium· 5.5Out-of-bounds read in Windows Aggregated Data Platform Service allows an authorized attacker to disclose information locally.
Out-of-bounds read in Windows Aggregated Data Platform Service allows an authorized attacker to disclose information locally.