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-2026-83968High· 7.8Use after free in Windows Biometric Service allows an authorized attacker to elevate privileges locally.
Use after free in Windows Biometric Service allows an authorized attacker to elevate privileges locally.
CVE-2026-83967High· 7.8Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate privileges locally.
CVE-2026-83955High· 7.8Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate privileges locally.
CVE-2026-83954High· 7.8Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate privileges locally.
CVE-2026-83952High· 7.8Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Resilient File System (ReFS) allows an authorized attacker to elevate privileges locally.
CVE-2026-83951Medium· 5.5Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
CVE-2026-83949Medium· 5.5Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
CVE-2026-83948High· 8.0Improper neutralization of special elements used in a command ('command injection') in Microsoft Azure CLI allows an authorized attacker to execute code over a network.
Improper neutralization of special elements used in a command ('command injection') in Microsoft Azure CLI allows an authorized attacker to execute code over a network.
CVE-2026-83942High· 7.8Missing authorization in Windows Kernel allows an authorized attacker to elevate privileges locally.
Missing authorization in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-83941Critical· 9.9Missing authorization in Entra ID allows an authorized attacker to elevate privileges over a network.
Missing authorization in Entra ID allows an authorized attacker to elevate privileges over a network.
CVE-2026-83940High· 7.0Use after free in Windows Device Association Service allows an authorized attacker to elevate privileges locally.
Use after free in Windows Device Association Service allows an authorized attacker to elevate privileges locally.
CVE-2026-83939High· 8.2Untrusted pointer dereference in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
Untrusted pointer dereference in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.
CVE-2026-83501Medium· 5.5Out-of-bounds read in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to disclose information locally.
Out-of-bounds read in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to disclose information locally.
CVE-2026-83498High· 7.8Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.
Untrusted pointer dereference in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.
CVE-2026-81963High· 7.8CISA KEV0dayPoCImproper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.
Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.
CVE-2026-81960High· 7.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-81959High· 7.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-81958Medium· 5.5Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
CVE-2026-81957High· 7.8Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-81956High· 7.8Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-81955High· 8.8Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.
CVE-2026-81954High· 7.8Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-81953High· 7.8Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-81952High· 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-2026-81951High· 7.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-81950High· 7.8Double free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Double free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-81949High· 7.8Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-81948High· 7.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-81947High· 7.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-81401Medium· 5.5Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.