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-2026-83933Medium· 5.5Improper link resolution before file access ('link following') in Windows Update Orchestrator Service allows an authorized attacker to disclose information locally.
Improper link resolution before file access ('link following') in Windows Update Orchestrator Service allows an authorized attacker to disclose information locally.
CVE-2026-83932High· 7.8Heap-based buffer overflow in Windows Group Policy allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Group Policy allows an authorized attacker to elevate privileges locally.
CVE-2026-83931High· 7.8Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.
Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.
CVE-2026-83930High· 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-2026-83929High· 8.8Out-of-bounds write in Windows GDI allows an unauthorized attacker to execute code over a network.
Out-of-bounds write in Windows GDI allows an unauthorized attacker to execute code over a network.
CVE-2026-83928High· 8.8Out-of-bounds write in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to execute code over a network.
Out-of-bounds write in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to execute code over a network.
CVE-2026-83927High· 7.8Improper link resolution before file access ('link following') in Windows Registry allows an authorized attacker to elevate privileges locally.
Improper link resolution before file access ('link following') in Windows Registry allows an authorized attacker to elevate privileges locally.
CVE-2026-83926Medium· 4.4Improper certificate validation in Windows Hello allows an authorized attacker to bypass a security feature locally.
Improper certificate validation in Windows Hello allows an authorized attacker to bypass a security feature locally.
CVE-2026-83925Medium· 4.7Use of uninitialized resource in Windows Kernel allows an authorized attacker to disclose information locally.
Use of uninitialized resource in Windows Kernel allows an authorized attacker to disclose information locally.
CVE-2026-83924High· 7.0Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-83923High· 8.8Relative path traversal in OpenSSH for Windows allows an unauthorized attacker to execute code over a network.
Relative path traversal in OpenSSH for Windows allows an unauthorized attacker to execute code over a network.
CVE-2026-83922High· 7.8Use after free in Windows Direct Composition allows an authorized attacker to elevate privileges locally.
Use after free in Windows Direct Composition allows an authorized attacker to elevate privileges locally.
CVE-2026-83921High· 7.0Heap-based buffer overflow in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.
CVE-2026-83920High· 7.8Heap-based buffer overflow in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.
CVE-2026-83919High· 7.8Heap-based buffer overflow in Microsoft Internet Messaging API allows an authorized attacker to execute code locally.
Heap-based buffer overflow in Microsoft Internet Messaging API allows an authorized attacker to execute code locally.
CVE-2026-83918High· 7.8Integer overflow or wraparound in Windows Kernel allows an authorized attacker to elevate privileges locally.
Integer overflow or wraparound in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-83917High· 7.0Use after free in Windows ALPC allows an authorized attacker to elevate privileges locally.
Use after free in Windows ALPC allows an authorized attacker to elevate privileges locally.
CVE-2026-83916High· 7.0Double free in Windows Error Reporting allows an authorized attacker to execute code locally.
Double free in Windows Error Reporting allows an authorized attacker to execute code locally.
CVE-2026-83915High· 7.0Use after free in Windows Diagnostic Policy Service allows an authorized attacker to elevate privileges locally.
Use after free in Windows Diagnostic Policy Service allows an authorized attacker to elevate privileges locally.
CVE-2026-83914High· 8.1Use after free in Microsoft XML allows an unauthorized attacker to execute code over a network.
Use after free in Microsoft XML allows an unauthorized attacker to execute code over a network.
CVE-2026-83913High· 7.8Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-83912High· 7.8Use after free in Windows Direct Composition allows an authorized attacker to elevate privileges locally.
Use after free in Windows Direct Composition allows an authorized attacker to elevate privileges locally.
CVE-2026-83911High· 7.0Heap-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.
CVE-2026-83910Critical· 9.8Out-of-bounds write in RPC Runtime allows an unauthorized attacker to execute code over a network.
Out-of-bounds write in RPC Runtime allows an unauthorized attacker to execute code over a network.
CVE-2026-83909Medium· 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-2026-83908High· 7.0Release of invalid pointer or reference in RPC Runtime allows an authorized attacker to elevate privileges locally.
Release of invalid pointer or reference in RPC Runtime allows an authorized attacker to elevate privileges locally.
CVE-2026-83907Medium· 5.5Exposure of sensitive system information to an unauthorized control sphere in Windows Hello allows an authorized attacker to disclose information locally.
Exposure of sensitive system information to an unauthorized control sphere in Windows Hello allows an authorized attacker to disclose information locally.
CVE-2026-83906Medium· 6.5Incorrect implementation of authentication algorithm in Windows Shell allows an unauthorized attacker to perform spoofing over a network.
Incorrect implementation of authentication algorithm in Windows Shell allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-83905Medium· 4.7Exposure of sensitive system information to an unauthorized control sphere in Windows Shell allows an authorized attacker to disclose information locally.
Exposure of sensitive system information to an unauthorized control sphere in Windows Shell allows an authorized attacker to disclose information locally.
CVE-2026-83904Medium· 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.