microsoft has 4,599 CVEs on record between 2012 and 2026. Disclosure cadence is accelerating: 2930 in the last 90 days against 934 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 934
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-2026-72969High· 7.0Use after free in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
Use after free in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
CVE-2026-72968High· 7.0Use after free in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
Use after free in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
CVE-2026-72955High· 7.0Use after free in Windows Application Compatibility Cache allows an authorized attacker to elevate privileges locally.
Use after free in Windows Application Compatibility Cache allows an authorized attacker to elevate privileges locally.
CVE-2026-72934High· 7.0Use after free in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
Use after free in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.
CVE-2026-71347Medium· 6.4Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Security Center allows an authorized attacker to elevate privileges locally.
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Security Center allows an authorized attacker to elevate privileges locally.
CVE-2026-70580High· 8.8Missing authentication for critical function in Windows Credential Guard allows an authorized attacker to perform spoofing locally.
Missing authentication for critical function in Windows Credential Guard allows an authorized attacker to perform spoofing locally.
CVE-2026-70571High· 8.1Stack-based buffer overflow in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
Stack-based buffer overflow in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
CVE-2026-70566High· 7.8Null pointer dereference in Windows Schannel allows an authorized attacker to elevate privileges locally.
Null pointer dereference in Windows Schannel allows an authorized attacker to elevate privileges locally.
CVE-2026-70343High· 8.8Heap-based buffer overflow in Microsoft MPEG-2 Video Extension allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft MPEG-2 Video Extension allows an unauthorized attacker to execute code over a network.
CVE-2026-70303High· 7.8Out-of-bounds write in Windows Kernel allows an authorized attacker to elevate privileges locally.
Out-of-bounds write in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-70302High· 8.8Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
CVE-2026-70301High· 8.8Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
CVE-2026-70300Critical· 9.8Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
CVE-2026-70299High· 8.8Improper access control in Windows Bind Filter Driver allows an authorized attacker to elevate privileges locally.
Improper access control in Windows Bind Filter Driver allows an authorized attacker to elevate privileges locally.
CVE-2026-70298Medium· 6.5Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.
Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.
CVE-2026-70297High· 8.8Absolute path traversal in Skype for Business and Microsoft Lync allows an authorized attacker to execute code over a network.
Absolute path traversal in Skype for Business and Microsoft Lync allows an authorized attacker to execute code over a network.
CVE-2026-70295Medium· 5.5Out-of-bounds read in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
Out-of-bounds read in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
CVE-2026-70294Medium· 5.5Out-of-bounds read in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
Out-of-bounds read in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
CVE-2026-70293Medium· 5.5Use of uninitialized resource in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
Use of uninitialized resource in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
CVE-2026-70292Medium· 5.5Out-of-bounds read in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
Out-of-bounds read in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
CVE-2026-70291Critical· 9.8Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
CVE-2026-70288Medium· 5.5Time-of-check time-of-use (toctou) race condition in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
Time-of-check time-of-use (toctou) race condition in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
CVE-2026-70287High· 8.8Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
CVE-2026-70286High· 7.8Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.
CVE-2026-70285High· 7.8Heap-based buffer overflow in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
CVE-2026-70284Medium· 5.5Use of uninitialized resource in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
Use of uninitialized resource in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.
CVE-2026-70282High· 8.8Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
CVE-2026-70281High· 7.5Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to disclose information over a network.
Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to disclose information over a network.
CVE-2026-70280Medium· 4.4Incorrect authorization in Windows Hello allows an authorized attacker to bypass a security feature locally.
Incorrect authorization in Windows Hello allows an authorized attacker to bypass a security feature locally.
CVE-2026-70279Critical· 9.3Improper 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.