microsoft has 2,953 CVEs on record between 2013 and 2026. Disclosure cadence is accelerating: 2138 in the last 90 days against 418 in the 90 before. The busiest recent month was September 2026 with 1005. The median CVSS is 7.8 (high), with 178 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 113 days (91 cases). The dominant weakness classes are CWE-122 (585) and CWE-416 (512). Most affected products: windows_10_1607 (626), Windows 10 Version 1607 (499), Microsoft 365 Apps for Enterprise (209).
CVEs per month
Last 12 months, by publish date
- Exploited share
- 3% vs 1% corpus
- Median CVSS
- 7.8
- Publish → KEV
- 113 d median(91)
- Last 90 days
- 2138 prev 418
Weakness classes
Products
- windows_10_1607 626
- Windows 10 Version 1607 499
- Microsoft 365 Apps for Enterprise 209
- windows_10 122
- 365_apps 115
- windows_10_1809 103
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.
2953 CVEsRSS
CVE-2026-80080High· 8.8Double free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Double free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
CVE-2026-80079Medium· 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-2026-80078Medium· 6.5Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information over a network.
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information over a network.
CVE-2026-80077High· 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-2026-80076Medium· 6.5Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information over a network.
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information over a network.
CVE-2026-80075High· 7.8Heap-based buffer overflow in Windows Work Folders allows an authorized attacker to elevate privileges locally.
Heap-based buffer overflow in Windows Work Folders allows an authorized attacker to elevate privileges locally.
CVE-2026-80074High· 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-2026-80073Medium· 6.5Out-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-2026-78526High· 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-2026-78525High· 8.8Use after free in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Use after free in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
CVE-2026-78524High· 8.8Out-of-bounds write in Microsoft Office allows an unauthorized attacker to execute code over a network.
Out-of-bounds write in Microsoft Office allows an unauthorized attacker to execute code over a network.
CVE-2026-78523Medium· 5.9Use after free in Windows DNS allows an unauthorized attacker to deny service over a network.
Use after free in Windows DNS allows an unauthorized attacker to deny service over a network.
CVE-2026-78522Medium· 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-2026-78521High· 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-2026-78520Medium· 6.5Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
CVE-2026-78519High· 8.8Use of uninitialized resource in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Use of uninitialized resource in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
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.