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-2026-69550Medium· 6.5Windows App for Mac Information Disclosure Vulnerability
Out-of-bounds read in Remote Desktop Client allows an unauthorized attacker to disclose information over a network.
CVE-2026-62727High· 7.0Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Telephony Service allows an authorized attacker to elevate privileges locally.
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Telephony Service allows an authorized attacker to elevate privileges locally.
CVE-2026-24301High· 8.8PoCMicrosoft Copilot Information Disclosure Vulnerability
Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.
CVE-2026-72970High· 8.3Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
CVE-2026-69414High· 7.8PoCMicrosoft Defender Elevation of Privilege Vulnerability
Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "ShieldBreak ".
CVE-2026-50523High· 7.8Microsoft PowerShell Remote Code Execution Vulnerability
Improper neutralization of special elements used in a command ('command injection') in Microsoft PowerShell allows an authorized attacker to execute code locally.
CVE-2026-73299Critical· 10.0Prompty is a markdown file format (.prompty) for LLM prompts
Prompty is a markdown file format (.prompty) for LLM prompts. Prior to 0.1.5 and 2.0.0-beta.5, the TypeScript Nunjucks renderer evaluated untrusted .prompty template bodies with unrestricted JavaScript member access. An attacker-controll…
GHSA-2q33-cf8w-7q23Critical· 9.8Duplicate Advisory: Microsoft QUIC Remote Code Execution Vulnerability
Duplicate Advisory: Microsoft QUIC Remote Code Execution Vulnerability
CVE-2026-70307High· 7.0Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVE-2026-70340High· 8.1Azure CycleCloud Elevation of Privilege Vulnerability
Missing authorization in Azure CycleCloud allows an authorized attacker to elevate privileges over a network.
CVE-2026-70330Medium· 6.7Windows DNS Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows DNS allows an authorized attacker to elevate privileges locally.
CVE-2026-70329High· 8.8Microsoft Outlook Remote Code Execution Vulnerability
Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
CVE-2026-70328Medium· 6.5Microsoft Excel Information Disclosure Vulnerability
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
CVE-2026-70327Medium· 6.5Microsoft Excel Information Disclosure Vulnerability
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
CVE-2026-70325Medium· 5.5Powerpoint Information Disclosure Vulnerability
Improper input validation in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.
CVE-2026-70324High· 8.8Microsoft SharePoint Elevation of Privilege Vulnerability
Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.
CVE-2026-70323Medium· 5.5Microsoft Office Information Disclosure Vulnerability
Improper input validation in Microsoft Office allows an unauthorized attacker to disclose information locally.
CVE-2026-70322Medium· 5.5Powerpoint Information Disclosure Vulnerability
Improper input validation in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.
CVE-2026-70321High· 8.8Microsoft SharePoint Remote Code Execution Vulnerability
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
CVE-2026-70320Medium· 5.5Powerpoint Information Disclosure Vulnerability
Improper input validation in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.
CVE-2026-70319Medium· 5.5Microsoft Office Word Information Disclosure Vulnerability
Improper input validation in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
CVE-2026-70318Medium· 5.5Microsoft Excel Information Disclosure Vulnerability
Improper input validation in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
CVE-2026-70317Medium· 5.5Microsoft Office Information Disclosure Vulnerability
Use of uninitialized resource in Microsoft Office allows an unauthorized attacker to disclose information locally.
CVE-2026-70316Medium· 5.5Powerpoint Information Disclosure Vulnerability
Improper input validation in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.
CVE-2026-70315Medium· 5.5Microsoft Office Information Disclosure Vulnerability
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.
CVE-2026-70314Medium· 5.5Microsoft Office Information Disclosure Vulnerability
Improper input validation in Microsoft Office allows an unauthorized attacker to disclose information locally.
CVE-2026-70313High· 7.8Microsoft PowerPoint Remote Code Execution Vulnerability
Improper input validation in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.
CVE-2026-70312Medium· 5.5Powerpoint Information Disclosure Vulnerability
Improper input validation in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.
CVE-2026-70311High· 7.8Microsoft Office Word Remote Code Execution Vulnerability
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
CVE-2026-70310Medium· 5.5Microsoft Word Information Disclosure Vulnerability
Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.