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
- 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
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-2026-56164Medium· 5.3CISA KEV0dayPoCMicrosoft SharePoint Server Elevation of Privilege Vulnerability
Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-56155High· 7.8CISA KEV0dayPoCActive Directory Federation Services Elevation of Privilege Vulnerability
Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.
CVE-2026-55948High· 7.8Microsoft Excel Remote Code Execution Vulnerability
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-55899High· 7.8Microsoft Excel Remote Code Execution Vulnerability
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-54127High· 7.4Windows Hyper-V Elevation of Privilege Vulnerability
Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.
CVE-2026-50694High· 8.1Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability
Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to execute code over a network.
CVE-2026-50678Medium· 6.6Microsoft Excel Information Disclosure Vulnerability
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
CVE-2026-58618High· 7.8Microsoft Excel Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-58614Medium· 5.5Windows Kernel Security Feature Bypass Vulnerability
Out-of-bounds read in Windows Kernel allows an authorized attacker to bypass a security feature locally.
CVE-2026-58610High· 7.8Microsoft Windows Media Foundation Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to execute code locally.
CVE-2026-58609High· 7.8Windows Graphics Component Remote Code Execution Vulnerability
Out-of-bounds read in Microsoft Graphics Component allows an unauthorized attacker to execute code locally.
CVE-2026-58608High· 8.8Windows Print Spooler Remote Code Execution Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Print Spooler Components allows an authorized attacker to execute code over a network.
CVE-2026-58602High· 7.8Windows Kernel-Mode Driver Elevation of Privilege Vulnerability
Use after free in Windows Kernel Mode Driver allows an authorized attacker to elevate privileges locally.
CVE-2026-58601High· 7.8Virtual Hard Disk (VHD) Miniport Driver Elevation of Privilege Vulernability
Heap-based buffer overflow in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to elevate privileges locally.
CVE-2026-58595High· 8.1Microsoft Bing App for IOS Spoofing Vulnerability
Improper restriction of rendered ui layers or frames in Microsoft Bing App for IOS allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-58526High· 7.0Windows Storage Elevation of Privilege Vulnerability
Use after free in Windows Storage allows an authorized attacker to elevate privileges locally.
CVE-2026-58279Medium· 6.5Missing authorization in Azure CycleCloud allows an authorized attacker to elevate privileges over a network.
Missing authorization in Azure CycleCloud allows an authorized attacker to elevate privileges over a network.
CVE-2026-55014High· 7.8Windows Remote Help Defense Elevation of Privilege Vulnerability
Improper access control in Windows Remote Help Defense allows an authorized attacker to elevate privileges locally.
CVE-2026-50522Critical· 9.8CISA KEVPoCMicrosoft SharePoint Remote Code Execution Vulnerability
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
CVE-2026-47301High· 8.8PoCConfiguration Manager Elevation of Privilege Vulnerability
Improper access control in Microsoft Configuration Manager allows an authorized attacker to elevate privileges over a network.
CVE-2026-49790High· 7.3Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability
Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability
CVE-2026-49789High· 7.3Stack-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.
Stack-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.
CVE-2026-49788High· 7.5HTTP/2 Denial of Service Vulnerability
Allocation of resources without limits or throttling in HTTP/2 allows an unauthorized attacker to deny service over a network.
CVE-2026-49787High· 7.5HTTP.sys Denial of Service Vulnerability
Allocation of resources without limits or throttling in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.
CVE-2026-49783High· 7.8Secure Boot Security Feature Bypass Vulnerability
Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
CVE-2026-49184High· 8.4Windows NTFS Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.
CVE-2026-49183High· 7.0Windows Clipboard Server Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Clipboard Server allows an authorized attacker to elevate privileges locally.
CVE-2026-49181High· 7.5Windows DHCP Client Elevation of Privilege Vulnerability
Integer underflow (wrap or wraparound) in Windows DHCP Client allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-49180Medium· 5.5Universal Plug and Play (upnp.dll) Information Disclosure Vulnerability
Improper link resolution before file access ('link following') in Universal Plug and Play (upnp.dll) allows an authorized attacker to disclose information locally.
CVE-2026-49178High· 8.8Windows Active Directory Domain Services Remote Code Execution Vulnerability
Heap-based buffer overflow in Active Directory Domain Services allows an authorized attacker to execute code over a network.