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-2026-45497High· 7.7Microsoft M365 Copilot Remote Code Execution Vulnerability
Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an authorized attacker to execute code over a network.
CVE-2026-48579Critical· 9.1Microsoft Exchange Online Information Disclosure Vulnerability
Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network.
CVE-2026-48567Critical· 10.0Azure HorizonDB Elevation of Privilege Vulnerability
Authentication bypass by spoofing in Azure HorizonDB allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-47294High· 8.0Improper neutralization of special elements used in an os command ('os command injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Improper neutralization of special elements used in an os command ('os command injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
CVE-2026-42827Medium· 6.5Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.
CVE-2026-41104Critical· 10.0Deserialization of untrusted data in Microsoft Planetary Computer Pro allows an unauthorized attacker to disclose information over a network.
Deserialization of untrusted data in Microsoft Planetary Computer Pro allows an unauthorized attacker to disclose information over a network.
CVE-2026-41090Critical· 9.3Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to perform tampering over a network.
Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to perform tampering over a network.
CVE-2026-40412Critical· 10.0Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code over a network.
Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code over a network.
CVE-2026-40411Critical· 9.9Improper input validation in Azure Virtual Network Gateway allows an authorized attacker to execute code over a network.
Improper input validation in Azure Virtual Network Gateway allows an authorized attacker to execute code over a network.
CVE-2026-35430High· 8.8Authorization bypass through user-controlled key in Azure Privileged Identity Management (PIM) allows an authorized attacker to elevate privileges over a network.
Authorization bypass through user-controlled key in Azure Privileged Identity Management (PIM) allows an authorized attacker to elevate privileges over a network.
CVE-2026-33843Critical· 9.1Authentication bypass using an alternate path or channel in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.
Authentication bypass using an alternate path or channel in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-26147High· 7.7Improper input validation in Azure Compute Gallery allows an authorized attacker to disclose information over a network.
Improper input validation in Azure Compute Gallery allows an authorized attacker to disclose information over a network.
CVE-2026-23663High· 7.5Improper privilege management in Azure Entra ID allows an unauthorized attacker to elevate privileges over a network.
Improper privilege management in Azure Entra ID allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-23652Critical· 10.0Improper neutralization of special elements used in a command ('command injection') in Microsoft Power Pages allows an unauthorized attacker to execute code over a network.
Improper neutralization of special elements used in a command ('command injection') in Microsoft Power Pages allows an unauthorized attacker to execute code over a network.
CVE-2026-45659High· 8.8CISA KEVPoCDeserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
CVE-2026-45584High· 8.1PoCHeap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.
CVE-2026-45498Medium· 4.0CISA KEV0dayPoCMicrosoft Defender Denial of Service Vulnerability
Microsoft Defender Denial of Service Vulnerability
CVE-2026-42834High· 7.8Improper access control in Windows Admin Center allows an authorized attacker to elevate privileges over a network.
Improper access control in Windows Admin Center allows an authorized attacker to elevate privileges over a network.
CVE-2026-45495High· 8.8Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
CVE-2026-45494Medium· 5.4Microsoft Edge (Chromium-based) Spoofing Vulnerability
Microsoft Edge (Chromium-based) Spoofing Vulnerability
CVE-2026-45492Medium· 5.4Improper input validation in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a security feature over a network.
Improper input validation in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a security feature over a network.
CVE-2026-42822Critical· 10.0Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges over a network.
Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-41109High· 8.8GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability
Improper neutralization of special elements in output used by a downstream component ('injection') in GitHub Copilot and Visual Studio allows an unauthorized attacker to bypass a security feature over a network.
CVE-2026-40369High· 7.8PoCHeap-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-2026-44503HighKiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect
Kiota abstractions RedirectHandler leaks Cookie/Proxy-Authorization headers on cross-host redirect
CVE-2026-21515Critical· 9.9Azure IoT Central Elevation of Privilege Vulnerability
Exposure of sensitive information to an unauthorized actor in Azure IOT Central allows an authorized attacker to elevate privileges over a network.
CVE-2026-33819Critical· 10.0Microsoft Bing Remote Code Execution Vulnerability
Deserialization of untrusted data in Microsoft Bing allows an unauthorized attacker to execute code over a network.
CVE-2026-32210Critical· 9.3Microsoft Dynamics 365 (online) Spoofing Vulnerability
Server-side request forgery (ssrf) in Microsoft Dynamics 365 (Online) allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-33102Critical· 9.3Microsoft 365 Copilot Elevation of Privilege Vulnerability
Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-26150High· 8.6Microsoft Purview eDiscovery Elevation of Privilege Vulnerability
Server-side request forgery (ssrf) in Microsoft Purview allows an unauthorized attacker to elevate privileges over a network.