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-2026-97757High· 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-2026-97756High· 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-2026-97755High· 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-2026-97754High· 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-2026-97753High· 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-2026-97752High· 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-2026-97751High· 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-2026-97750High· 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-2026-97749Critical· 9.8Double free in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Double free in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
CVE-2026-97748High· 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-2026-97747High· 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-2026-97746High· 8.8Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97745High· 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-2026-97744Medium· 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-2026-97743Medium· 6.5Use after free in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Use after free in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
CVE-2026-97742High· 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-2026-97741High· 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-2026-97740Medium· 6.5Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
CVE-2026-97739High· 8.8Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97738High· 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-2026-97017High· 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-2026-97016Critical· 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-2026-97014Medium· 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-2026-97012High· 8.8Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
CVE-2026-97011High· 8.8Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97010High· 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-2026-97009High· 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-2026-97008High· 8.8Buffer underwrite ('buffer underflow') in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Buffer underwrite ('buffer underflow') in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CVE-2026-97007High· 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-2026-97005Medium· 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.