microsoft has 2,953 CVEs on record between 2013 and 2026. Disclosure cadence is accelerating: 2136 in the last 90 days against 414 in the 90 before. The busiest recent month was September 2026 with 1005. The median CVSS is 7.8 (high), with 178 rated critical. 3% have been exploited in the wild, in line with the corpus average. The median gap from publication to a KEV listing is 113 days (91 cases). The dominant weakness classes are CWE-122 (585) and CWE-416 (512). Most affected products: windows_10_1607 (644), Windows 10 Version 1607 (481), Microsoft 365 Apps for Enterprise (209).
CVEs per month
Last 12 months, by publish date
- Exploited share
- 3% vs 1% corpus
- Median CVSS
- 7.8
- Publish → KEV
- 113 d median(91)
- Last 90 days
- 2136 prev 414
Weakness classes
Products
- windows_10_1607 644
- Windows 10 Version 1607 481
- Microsoft 365 Apps for Enterprise 209
- windows_10 122
- 365_apps 115
- windows_10_1809 106
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.
2953 CVEsRSS
CVE-2026-42980High· 7.8PoCInteger underflow (wrap or wraparound) in Windows NT OS Kernel allows an authorized attacker to elevate privileges locally.
Integer underflow (wrap or wraparound) in Windows NT OS Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-47631High· 8.1Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-45583High· 7.5Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
CVE-2026-45504High· 8.8PoCServer-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
CVE-2026-45503High· 8.1Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
CVE-2026-45502Medium· 5.0Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
CVE-2026-45501Medium· 6.5Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.
Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.
CVE-2026-45500Medium· 6.1Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-45591High· 7.5ASP.NET Core Denial of Service Vulnerability
Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.
CVE-2026-45491Medium· 6.2.NET Tampering Vulnerability
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.
CVE-2026-26142Critical· 9.8Deserialization of untrusted data in Nuance PowerScribe allows an unauthorized attacker to execute code over a network.
Deserialization of untrusted data in Nuance PowerScribe allows an unauthorized attacker to execute code over a network.
CVE-2026-47644Medium· 6.5Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability
Improper neutralization of special elements in output used by a downstream component ('injection') in Copilot Chat (Microsoft Edge) allows an unauthorized attacker to disclose information over a network.
CVE-2026-47655Medium· 6.5Microsoft Graph Information Disclosure Vulnerability
Exposure of sensitive information to an unauthorized actor in Microsoft Graph allows an authorized attacker to disclose information over a network.
CVE-2026-42824Medium· 6.5M365 Copilot Information Disclosure Vulnerability
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-2026-45497High· 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.