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-2026-55134High· 7.8Microsoft Word Remote Code Execution Vulnerability
Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.
CVE-2026-55133High· 7.8Microsoft OneNote Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code locally.
CVE-2026-55132High· 7.8Microsoft Word Remote Code Execution Vulnerability
Double free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
CVE-2026-55131High· 7.8Microsoft Excel Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-55130High· 7.8Microsoft Word Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.
CVE-2026-55128High· 7.8Microsoft Word Remote Code Execution Vulnerability
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
CVE-2026-55123High· 7.8Microsoft PowerPoint Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.
CVE-2026-55120High· 7.8Microsoft PowerPoint Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.
CVE-2026-55057Medium· 5.5Microsoft Office Information Disclosure Vulnerability
Integer overflow or wraparound in Microsoft Office allows an unauthorized attacker to disclose information locally.
CVE-2026-55056High· 7.8Microsoft Office Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
CVE-2026-55052High· 8.8Microsoft SharePoint Elevation of Privilege Vulnerability
Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
CVE-2026-55051Medium· 6.5Microsoft SharePoint Server Information Disclosure Vulnerability
Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.
CVE-2026-55043High· 7.8Microsoft PowerPoint Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.
CVE-2026-55042Medium· 5.5Microsoft Office Information Disclosure Vulnerability
Use of uninitialized resource in Microsoft Office allows an unauthorized attacker to disclose information locally.
CVE-2026-55040Critical· 9.1CISA KEVPoCMicrosoft SharePoint Server Security Feature Bypass Vulnerability
Weak authentication in Microsoft Office SharePoint allows an unauthorized attacker to bypass a security feature over a network.
CVE-2026-54116Medium· 6.5Microsoft SQL Server Information Disclosure Vulnerability
Access of resource using incompatible type ('type confusion') in SQL Server allows an authorized attacker to disclose information over a network.
CVE-2026-50468Medium· 6.5Microsoft SQL Server Information Disclosure Vulnerability
Buffer over-read in SQL Server allows an authorized attacker to disclose information over a network.
CVE-2026-56176High· 7.8Out-of-bounds read in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
Out-of-bounds read in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
CVE-2026-56157Medium· 5.4Microsoft SharePoint Server Spoofing Vulnerability
Improper access control in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
CVE-2026-56156High· 7.8Microsoft Excel Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-55949High· 7.8Microsoft Excel Remote Code Execution Vulnerability
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-55947High· 7.8Microsoft Excel Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-55944Critical· 9.8PoCMicrosoft Dynamics NAV and Microsoft Dynamics 365 Business Central (On Premises) Remote Code Execution Vulnerability
Deserialization of untrusted data in Microsoft Dynamics NAV allows an unauthorized attacker to execute code over a network.
CVE-2026-55898Medium· 6.1Microsoft Excel Information Disclosure Vulnerability
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
CVE-2026-54131High· 7.8Microsoft Excel Remote Code Execution Vulnerability
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-50359High· 7.0Microsoft XML Core Services Elevation of Privilege Vulnerability
Use after free in Microsoft XML Core Services allows an authorized attacker to elevate privileges locally.
CVE-2026-56190Critical· 9.8PoCRemote Desktop Protocol Remote Code Execution Vulnerability
Use of uninitialized resource in Windows RDP allows an unauthorized attacker to execute code over a network.
CVE-2026-56188Critical· 9.8Windows Server Network driver Remote Code Execution Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Server Network driver allows an unauthorized attacker to execute code over a network.
CVE-2026-56187High· 7.0Windows MIDI Service Module Elevation of Privileges Vulnerability
Use after free in Windows MIDI Service Module allows an authorized attacker to elevate privileges locally.
CVE-2026-56186High· 8.1Windows Secure Channel Information Disclosure Vulnerability
Out-of-bounds read in Windows Schannel allows an authorized attacker to disclose information over a network.