microsoft has 4,538 CVEs on record between 2012 and 2026. Disclosure cadence is accelerating: 2914 in the last 90 days against 931 in the 90 before. The busiest recent month was October 2026 with 1465. The median CVSS is 7.8 (high), with 269 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 (924) and CWE-416 (846). Most affected products: windows_10_1607 (984), Windows 10 Version 1607 (880), 365_apps (265).
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
- 2914 prev 931
Weakness classes
Products
- windows_10_1607 984
- Windows 10 Version 1607 880
- 365_apps 265
- Microsoft 365 Apps for Enterprise 233
- Windows 10 Version 1809 198
- windows_10_1809 172
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.
4538 CVEsRSS
CVE-2026-97792High· 7.8Improper access control in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
Improper access control in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
CVE-2026-97790Medium· 5.5Improper link resolution before file access ('link following') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to perform tampering locally.
Improper link resolution before file access ('link following') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to perform tampering locally.
CVE-2026-97789High· 7.5Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
CVE-2026-97788High· 7.5Observable discrepancy in Active Directory Federation Services (AD FS) allows an unauthorized attacker to disclose information over a network.
Observable discrepancy in Active Directory Federation Services (AD FS) allows an unauthorized attacker to disclose information over a network.
CVE-2026-97787High· 7.0Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.
CVE-2026-97783High· 8.1Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-97782Medium· 6.8Observable discrepancy in Microsoft Office SharePoint allows an authorized attacker to perform tampering over a network.
Observable discrepancy in Microsoft Office SharePoint allows an authorized attacker to perform tampering over a network.
CVE-2026-97781High· 8.8Improper neutralization of special elements used in a command ('command injection') in Microsoft Office OneNote allows an unauthorized attacker to execute code over a network.
Improper neutralization of special elements used in a command ('command injection') in Microsoft Office OneNote allows an unauthorized attacker to execute code over a network.
CVE-2026-97780High· 8.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97779Medium· 6.5Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
CVE-2026-97778High· 8.8Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97777High· 8.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97776High· 8.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97775High· 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-2026-97774High· 7.0Time-of-check time-of-use (toctou) race condition in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.
Time-of-check time-of-use (toctou) race condition in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.
CVE-2026-97773High· 8.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97772High· 8.8Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97771High· 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-2026-97770High· 8.8Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97769High· 8.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97768High· 8.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97767High· 8.8Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97766High· 8.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97765High· 8.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97763High· 8.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97762High· 8.8Out-of-bounds write in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Out-of-bounds write in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97761High· 8.8Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97760Medium· 6.5Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
CVE-2026-97759High· 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-2026-97758High· 8.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.