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-2026-62873Critical· 9.8Microsoft 365 Admin Center Elevation of Privilege Vulnerability
Improper verification of cryptographic signature in Microsoft 365 Admin Center allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-68823Critical· 9.1Azure Confidential Ledger Remote Code Execution Vulnerability
Exposed dangerous method or function in Azure Confidential Ledger allows an authorized attacker to execute code over a network.
CVE-2026-65667Critical· 10.0Microsoft Teams Elevation of Privilege Vulnerability
Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-62830Critical· 9.9Azure SRE Agent Elevation of Privilege Vulnerability
Missing authorization in Azure SRE Agent allows an authorized attacker to elevate privileges over a network.
CVE-2026-59118Critical· 9.3Copilot Cowork Elevation of Privilege Vulnerability
Improper authorization in Copilot Cowork allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-56161Critical· 9.6Azure Logic Apps Information Disclosure Vulnerability
Improper access control in Azure Logic Apps allows an authorized attacker to disclose information over a network.
CVE-2026-49163High· 8.8Application Insights Profiler Elevation of Privilege Vulnerability
Improper limitation of a pathname to a restricted directory ('path traversal') in Application Insights Profiler allows an authorized attacker to elevate privileges over a network.
CVE-2026-66310High· 7.7External control of file name or path in Microsoft Edge for Android allows an unauthorized attacker to disclose information locally.
External control of file name or path in Microsoft Edge for Android allows an unauthorized attacker to disclose information locally.
CVE-2026-62870High· 8.8Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-66321High· 7.4Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
CVE-2026-66318High· 8.1Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
CVE-2026-66316Medium· 5.4Microsoft Edge (Chromium-based) Spoofing Vulnerability
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-66315High· 7.5Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
CVE-2026-66314Medium· 6.5Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
Time-of-check time-of-use (toctou) race condition in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
CVE-2026-66313Medium· 6.8Microsoft Edge (Chromium-based) Tampering Vulnerability
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally.
CVE-2026-66312Medium· 6.5Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Buffer over-read in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.
CVE-2026-66325Medium· 6.1Microsoft Edge (Chromium-based) Spoofing Vulnerability
Server-side request forgery (ssrf) in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-66317Medium· 5.4Microsoft Edge (Chromium-based) Tampering Vulnerability
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering over a network.
CVE-2026-66311Medium· 6.2Microsoft Edge (Chromium-based) Tampering Vulnerability
Missing authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform tampering locally.
CVE-2026-65804Medium· 6.1Microsoft Edge (Chromium-based) Spoofing Vulnerability
Improper control of generation of code ('code injection') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-65802High· 7.4Microsoft Edge for Android Information Disclosure Vulnerability
External control of file name or path in Microsoft Edge for Android allows an unauthorized attacker to disclose information over a network.
CVE-2026-66326Medium· 6.5Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Missing authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
CVE-2026-66322High· 7.1Microsoft Edge (Chromium-based) Spoofing Vulnerability
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-66803Critical· 10.0Azure Cosmos DB Remote Code Execution Vulnerability
Improper access control in Azure Cosmos DB allows an unauthorized attacker to execute code over a network.
CVE-2026-62828Medium· 5.4Microsoft Edge for Android (Chromium-based) Tampering Vulnerability
Improper input validation in Microsoft Edge for Android allows an unauthorized attacker to perform tampering over a network.
CVE-2026-57990High· 7.4Files or directories accessible to external parties in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
Files or directories accessible to external parties in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
CVE-2026-57989High· 7.4Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
CVE-2026-57978Medium· 5.4Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-56163Critical· 10.0Microsoft Azure Kubernetes Service Elevation of Privilege Vulnerability
Missing authentication for critical function in Microsoft Azure Kubernetes Service allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-50517Critical· 9.9Microsoft M365 Copilot Remote Code Execution Vulnerability
Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.