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-2026-78518High· 8.8Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-78517High· 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-2026-78516Medium· 4.3Insertion of sensitive information into externally-accessible file or directory in Windows Storage allows an authorized attacker to disclose information locally.
Insertion of sensitive information into externally-accessible file or directory in Windows Storage allows an authorized attacker to disclose information locally.
CVE-2026-78515Medium· 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-2026-78514High· 8.8Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
CVE-2026-78513Medium· 5.5Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.
Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.
CVE-2026-78512High· 8.8Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
CVE-2026-78511High· 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-2026-78510High· 8.4Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
CVE-2026-78509Critical· 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-2026-78508Medium· 4.6Out-of-bounds read in Windows CD-ROM Driver allows an unauthorized attacker to disclose information with a physical attack.
Out-of-bounds read in Windows CD-ROM Driver allows an unauthorized attacker to disclose information with a physical attack.
CVE-2026-78507High· 8.8Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
CVE-2026-78506Medium· 5.5Improper null termination in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
Improper null termination in Microsoft Office Word allows an unauthorized attacker to disclose information locally.
CVE-2026-78505High· 8.8Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code over a network.
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code over a network.
CVE-2026-78504High· 8.8Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
CVE-2026-78503Medium· 6.5Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.
Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.
CVE-2026-78502Medium· 6.5Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.
Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.
CVE-2026-78464High· 7.0Time-of-check time-of-use (toctou) race condition in Windows MIDI Service Module allows an authorized attacker to elevate privileges locally.
Time-of-check time-of-use (toctou) race condition in Windows MIDI Service Module allows an authorized attacker to elevate privileges locally.
CVE-2026-78463High· 8.8Improper control of generation of code ('code injection') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Improper control of generation of code ('code injection') in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
CVE-2026-78462High· 8.8Authorization bypass through user-controlled key in Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.
Authorization bypass through user-controlled key in Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.
CVE-2026-78461High· 7.4Improper limitation of a pathname to a restricted directory ('path traversal') in Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.
Improper limitation of a pathname to a restricted directory ('path traversal') in Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.
CVE-2026-78457High· 7.0Use after free in Windows Security App allows an authorized attacker to elevate privileges locally.
Use after free in Windows Security App allows an authorized attacker to elevate privileges locally.
CVE-2026-78456High· 8.8Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.
Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network.
CVE-2026-78455Medium· 4.3Out-of-bounds read in Xbox allows an unauthorized attacker to disclose information with a physical attack.
Out-of-bounds read in Xbox allows an unauthorized attacker to disclose information with a physical attack.
CVE-2026-78454Medium· 5.5Out-of-bounds read in Windows CD-ROM Driver allows an authorized attacker to disclose information locally.
Out-of-bounds read in Windows CD-ROM Driver allows an authorized attacker to disclose information locally.
CVE-2026-78453Medium· 6.5Integer underflow (wrap or wraparound) in Microsoft Windows SCSI Class System File allows an unauthorized attacker to disclose information over a network.
Integer underflow (wrap or wraparound) in Microsoft Windows SCSI Class System File allows an unauthorized attacker to disclose information over a network.
CVE-2026-78452Medium· 4.6Out-of-bounds read in Microsoft Windows SCSI Class System File allows an unauthorized attacker to disclose information with a physical attack.
Out-of-bounds read in Microsoft Windows SCSI Class System File allows an unauthorized attacker to disclose information with a physical attack.
CVE-2026-78451Medium· 6.8Untrusted pointer dereference in Microsoft Windows SCSI Class System File allows an unauthorized attacker to elevate privileges with a physical attack.
Untrusted pointer dereference in Microsoft Windows SCSI Class System File allows an unauthorized attacker to elevate privileges with a physical attack.
CVE-2026-78450High· 8.1Use after free in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over a network.
Use after free in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over a network.
CVE-2026-78449High· 8.1Use after free in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over a network.
Use after free in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over a network.