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-2026-69639Critical· 9.8Heap-based buffer overflow in Windows Libarchive allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Windows Libarchive allows an unauthorized attacker to execute code over a network.
CVE-2026-69635Medium· 6.6Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges with a physical attack.
Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges with a physical attack.
CVE-2026-69634Critical· 9.8Heap-based buffer overflow in Windows iSCSI allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Windows iSCSI allows an unauthorized attacker to execute code over a network.
CVE-2026-69633High· 7.8Heap-based buffer overflow in Windows Update allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Update allows an authorized attacker to elevate privileges locally.
CVE-2026-69596High· 7.0Use after free in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
Use after free in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
CVE-2026-69577High· 7.5Out-of-bounds read in Microsoft Azure Attestation service and Device Health Attestation Service allows an unauthorized attacker to disclose information over a network.
Out-of-bounds read in Microsoft Azure Attestation service and Device Health Attestation Service allows an unauthorized attacker to disclose information over a network.
CVE-2026-69521High· 8.8Integer overflow or wraparound in Windows iSCSI allows an unauthorized attacker to execute code over a network.
Integer overflow or wraparound in Windows iSCSI allows an unauthorized attacker to execute code over a network.
CVE-2026-69506Medium· 4.7Out-of-bounds read in Windows Key Storage Provider allows an authorized attacker to disclose information locally.
Out-of-bounds read in Windows Key Storage Provider allows an authorized attacker to disclose information locally.
CVE-2026-69471High· 7.8Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.
CVE-2026-69454High· 7.5Out-of-bounds read in Microsoft Azure Attestation service and Device Health Attestation Service allows an unauthorized attacker to disclose information over a network.
Out-of-bounds read in Microsoft Azure Attestation service and Device Health Attestation Service allows an unauthorized attacker to disclose information over a network.
CVE-2026-69452High· 7.1Use after free in Windows Enterprise App Management allows an authorized attacker to elevate privileges over a network.
Use after free in Windows Enterprise App Management allows an authorized attacker to elevate privileges over a network.
CVE-2026-69387High· 7.0Use after free in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
Use after free in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
CVE-2026-69370High· 8.8Improper neutralization of special elements used in a command ('command injection') in Visual Studio Code allows an unauthorized attacker to execute code over a network.
Improper neutralization of special elements used in a command ('command injection') in Visual Studio Code allows an unauthorized attacker to execute code over a network.
CVE-2026-69363High· 8.0Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privileges over a network.
Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privileges over a network.
CVE-2026-69354High· 7.8Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
CVE-2026-69326High· 8.8Heap-based buffer overflow in Graphic Fonts allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Graphic Fonts allows an unauthorized attacker to execute code over a network.
CVE-2026-68836High· 7.8Heap-based buffer overflow in Windows kernel32.dll allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows kernel32.dll allows an authorized attacker to elevate privileges locally.
CVE-2026-66822Medium· 5.9Insertion of sensitive information into sent data in .NET allows an unauthorized attacker to disclose information over a network.
Insertion of sensitive information into sent data in .NET allows an unauthorized attacker to disclose information over a network.
CVE-2026-62879Medium· 5.5Missing authentication for critical function in Windows SmartScreen allows an authorized attacker to perform tampering locally.
Missing authentication for critical function in Windows SmartScreen allows an authorized attacker to perform tampering locally.
CVE-2026-62687Medium· 5.5Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to disclose information locally.
Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to disclose information locally.
CVE-2026-61931High· 7.8Use after free in Windows Perception Simulation Service allows an authorized attacker to elevate privileges locally.
Use after free in Windows Perception Simulation Service allows an authorized attacker to elevate privileges locally.
CVE-2026-59116Medium· 6.8Use of a broken or risky cryptographic algorithm in Windows Remote Desktop allows an unauthorized attacker to bypass a security feature over a network.
Use of a broken or risky cryptographic algorithm in Windows Remote Desktop allows an unauthorized attacker to bypass a security feature over a network.
CVE-2026-58280High· 7.5Uncontrolled recursion in .NET allows an unauthorized attacker to deny service over a network.
Uncontrolled recursion in .NET allows an unauthorized attacker to deny service over a network.
CVE-2026-49785High· 7.8Improper resource shutdown or release in Windows UEFI allows an authorized attacker to bypass a security feature locally.
Improper resource shutdown or release in Windows UEFI allows an authorized attacker to bypass a security feature locally.
CVE-2026-109453High· 7.0Heap-based buffer overflow in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to elevate privileges locally.
CVE-2026-108471High· 8.8Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.
Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.
CVE-2026-108468High· 7.0Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.
Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.
CVE-2026-108467High· 8.8Heap-based buffer overflow in Microsoft PostScript Printer Driver allows an authorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft PostScript Printer Driver allows an authorized attacker to execute code over a network.
CVE-2026-108466Medium· 5.3Out-of-bounds read in Windows Kernel allows an unauthorized attacker to deny service over a network.
Out-of-bounds read in Windows Kernel allows an unauthorized attacker to deny service over a network.
CVE-2026-108465High· 7.0Use after free in Windows Update Delivery Optimization allows an authorized attacker to elevate privileges locally.
Use after free in Windows Update Delivery Optimization allows an authorized attacker to elevate privileges locally.