Microsoft has 2,568 CVEs on record between 2013 and 2026. Disclosure cadence is accelerating: 2136 in the last 90 days against 45 in the 90 before. The busiest recent month was September 2026 with 1003. The median CVSS is 7.8 (high), with 152 rated critical. 3% have been exploited in the wild, in line with the corpus average. The median gap from publication to a KEV listing is 137 days (84 cases). The dominant weakness classes are CWE-122 (555) and CWE-416 (415). Most affected products: Windows 10 Version 1607 (500), windows_10_1607 (485), Microsoft 365 Apps for Enterprise (168).
CVEs per month
Last 12 months, by publish date
- Exploited share
- 3% vs 1% corpus
- Median CVSS
- 7.8
- Publish → KEV
- 137 d median(84)
- Last 90 days
- 2136 prev 45
Weakness classes
Products
- Windows 10 Version 1607 500
- windows_10_1607 485
- Microsoft 365 Apps for Enterprise 168
- windows_10 122
- 365_apps 115
- Windows 11 Version 24H2 97
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.
2568 CVEsRSS
CVE-2026-66304High· 7.5Server-side request forgery (ssrf) in Skype for Business allows an unauthorized attacker to disclose information over a network.
Server-side request forgery (ssrf) in Skype for Business allows an unauthorized attacker to disclose information over a network.
CVE-2026-66302Critical· 9.8External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network.
External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network.
CVE-2026-69646High· 8.3Improper verification of cryptographic signature in Skype for Business allows an unauthorized attacker to perform spoofing over an adjacent network.
Improper verification of cryptographic signature in Skype for Business allows an unauthorized attacker to perform spoofing over an adjacent network.
CVE-2026-69642Medium· 6.5Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.
Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-66307High· 7.5Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.
Integer underflow (wrap or wraparound) in Skype for Business allows an unauthorized attacker to deny service over a network.
CVE-2026-66305High· 7.1Use of client-side authentication in Skype for Business allows an authorized attacker to perform spoofing over a network.
Use of client-side authentication in Skype for Business allows an authorized attacker to perform spoofing over a network.
CVE-2026-66303Medium· 6.5Null pointer dereference in Skype for Business allows an authorized attacker to deny service over a network.
Null pointer dereference in Skype for Business allows an authorized attacker to deny service over a network.
CVE-2026-63523Medium· 6.5Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.
Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-66306Medium· 6.5Generation of error message containing sensitive information in Skype for Business allows an unauthorized attacker to disclose information over a network.
Generation of error message containing sensitive information in Skype for Business allows an unauthorized attacker to disclose information over a network.
CVE-2026-85880High· 7.8CISA KEV0dayPoCHeap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.
CVE-2026-85877High· 8.8Heap-based buffer overflow in Windows Print Spooler Components allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Windows Print Spooler Components allows an unauthorized attacker to execute code over a network.
CVE-2026-85875Medium· 5.5Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
CVE-2026-85360High· 7.0Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
CVE-2026-84003High· 7.4Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.
Authentication bypass by capture-replay in Microsoft Authentication Library (MSAL) for Node.js allows an unauthorized attacker to perform spoofing over a network.
CVE-2026-84001High· 7.5Out-of-bounds read in Windows Key Distribution Center allows an unauthorized attacker to deny service over a network.
Out-of-bounds read in Windows Key Distribution Center allows an unauthorized attacker to deny service over a network.
CVE-2026-84000High· 7.8Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to execute code locally.
Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to execute code locally.
CVE-2026-83999High· 7.0Improper link resolution before file access ('link following') in Windows Resilient File System (ReFS) Deduplication Service allows an authorized attacker to elevate privileges locally.
Improper link resolution before file access ('link following') in Windows Resilient File System (ReFS) Deduplication Service allows an authorized attacker to elevate privileges locally.
CVE-2026-83998High· 8.8Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
CVE-2026-83997High· 8.1Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
CVE-2026-83996High· 8.8Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
CVE-2026-83995High· 7.8Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows NTFS allows an authorized attacker to elevate privileges locally.
CVE-2026-83992High· 8.8Heap-based buffer overflow in Windows Imaging Component allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Windows Imaging Component allows an unauthorized attacker to execute code over a network.
CVE-2026-83991Medium· 5.5PoCMissing authentication for critical function in Windows Cloud Files Mini Filter Driver allows an authorized attacker to perform tampering locally.
Missing authentication for critical function in Windows Cloud Files Mini Filter Driver allows an authorized attacker to perform tampering locally.
CVE-2026-83990High· 7.8Stack-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.
Stack-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.
CVE-2026-83989High· 7.5Out-of-bounds read in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to deny service over a network.
Out-of-bounds read in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to deny service over a network.
CVE-2026-83988High· 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-2026-83987High· 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-2026-83986High· 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-2026-83985High· 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-2026-83983High· 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.