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-2026-70009Critical· 9.3Improper limitation of a pathname to a restricted directory ('path traversal') in Azure Arc allows an unauthorized attacker to elevate privileges over a network.
Improper limitation of a pathname to a restricted directory ('path traversal') in Azure Arc allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-69865Critical· 10.0Authorization bypass through user-controlled key in Microsoft Container Registry allows an unauthorized attacker to elevate privileges over a network.
Authorization bypass through user-controlled key in Microsoft Container Registry allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-69399Critical· 10.0Azure Arc Elevation of Privilege Vulnerability
Azure Arc Elevation of Privilege Vulnerability
CVE-2026-68791High· 8.6Incorrect authorization in Azure Machine Learning allows an unauthorized attacker to disclose information over a network.
Incorrect authorization in Azure Machine Learning allows an unauthorized attacker to disclose information over a network.
CVE-2026-55946Medium· 6.1Ai command injection in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.
Ai command injection in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.
CVE-2026-85893High· 8.8Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to elevate privileges over a network.
Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-69486High· 8.8Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
CVE-2026-85921High· 8.2Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
CVE-2026-85892High· 7.8Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge (Chromium-based) allows an authorized attacker to elevate privileges locally.
Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge (Chromium-based) allows an authorized attacker to elevate privileges locally.
CVE-2026-70341High· 8.5Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.
Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.
CVE-2026-77490Medium· 6.1Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
GHSA-mqvm-gmc4-6rv2High· 8.8Duplicate Advisory: Microsoft Security Advisory CVE-2026-69439 – .NET and Visual Studio Elevation of Privilege Vulnerability
Duplicate Advisory: Microsoft Security Advisory CVE-2026-69439 – .NET and Visual Studio Elevation of Privilege Vulnerability
GHSA-4qhr-qf46-fcrxHigh· 8.8Duplicate Advisory: Microsoft Security Advisory CVE-2026-71328 – .NET and Visual Studio Remote Code Execution Vulnerability
Duplicate Advisory: Microsoft Security Advisory CVE-2026-71328 – .NET and Visual Studio Remote Code Execution Vulnerability
GHSA-v3f6-m9j2-437pMedium· 5.9Duplicate Advisory: Microsoft Security Advisory CVE-2026-69304 – ASP.NET Core Denial of Service Vulnerability
Duplicate Advisory: Microsoft Security Advisory CVE-2026-69304 – ASP.NET Core Denial of Service Vulnerability
GHSA-q72m-f2r4-w4cwHigh· 8.8Duplicate Advisory: Microsoft Security Advisory CVE-2026-69522 – .NET and Visual Studio Remote Code Execution Vulnerability
Duplicate Advisory: Microsoft Security Advisory CVE-2026-69522 – .NET and Visual Studio Remote Code Execution Vulnerability
CVE-2026-66308Medium· 6.5Out-of-bounds read in Skype for Business allows an authorized attacker to deny service over a network.
Out-of-bounds read in Skype for Business allows an authorized attacker to deny service over a network.
CVE-2026-66304High· 7.5Server-side request forgery (ssrf) in Skype for Business allows an unauthorized attacker to disclose information over a network.
Server-side request forgery (ssrf) in Skype for Business allows an unauthorized attacker to disclose information over a network.
CVE-2026-66302Critical· 9.8External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network.
External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network.
CVE-2026-69646High· 8.3Improper verification of cryptographic signature in Skype for Business allows an unauthorized attacker to perform spoofing over an adjacent network.
Improper verification of cryptographic signature in Skype for Business allows an unauthorized attacker to perform spoofing over an adjacent network.
CVE-2026-69642Medium· 6.5Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.
Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-66307High· 7.5Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.
Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.
CVE-2026-66305High· 7.1Use of client-side authentication in Skype for Business allows an authorized attacker to perform spoofing over a network.
Use of client-side authentication in Skype for Business allows an authorized attacker to perform spoofing over a network.
CVE-2026-66303Medium· 6.5Null pointer dereference in Skype for Business allows an authorized attacker to deny service over a network.
Null pointer dereference in Skype for Business allows an authorized attacker to deny service over a network.
CVE-2026-63523Medium· 6.5Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.
Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-66306Medium· 6.5Generation of error message containing sensitive information in Skype for Business allows an unauthorized attacker to disclose information over a network.
Generation of error message containing sensitive information in Skype for Business allows an unauthorized attacker to disclose information over a network.
CVE-2026-85880High· 7.8CISA KEV0dayPoCHeap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.
CVE-2026-85877High· 8.8Heap-based buffer overflow in Windows Print Spooler Components allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Windows Print Spooler Components allows an unauthorized attacker to execute code over a network.
CVE-2026-85875Medium· 5.5Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
CVE-2026-85360High· 7.0Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-84003High· 7.4Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.
Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.