Microsoft
16,303 CVEs across 298 months on the top 200 list since Feb 2005. Peak rank #1 in 31 months, last Apr 2023. 381 of them are now in CISA KEV.
Microsoft CVEs per month since Feb 2005
Oct 2021: 94 CVEs · 3 critical · 6 now in CISA KEV · rank #5 · mostly Windows Server 2004 (Server Core Installation), Windows Server 2022, Windows Server Version 2004Nov 2021: 87 CVEs · 3 critical · 5 now in CISA KEV · rank #4 · mostly Windows Server 2016, Windows Server 2019, Microsoft EdgeDec 2021: 96 CVEs · 9 critical · 3 now in CISA KEV · rank #5 · mostly Windows Server 2016, Windows 10 Version 2004, Windows 10 2004Jan 2022: 103 CVEs · 7 critical · 2 now in CISA KEV · rank #6 · mostly Windows Server 2019, Windows 10, Windows Server 2019 (Server Core Installation)Feb 2022: 98 CVEs · 2 critical · 4 now in CISA KEV · rank #7 · mostly Microsoft Edge, Windows 11 Version 21h2, Windows 11Mar 2022: 72 CVEs · 0 critical · 0 now in CISA KEV · rank #12 · mostly Windows 10, Windows 10 21h2, Windows 10 21h1Apr 2022: 181 CVEs · 6 critical · 2 now in CISA KEV · rank #2 · mostly Windows Server 2022, Windows Server 2016, Windows Server Version 20h2May 2022: 76 CVEs · 3 critical · 2 now in CISA KEV · rank #7 · mostly Windows Server Version 20h2, Windows Server 20h2 (Server Core Installation), Windows Server 2019Jun 2022: 63 CVEs · 1 critical · 1 now in CISA KEV · rank #11 · mostly Windows Server 2019 (Server Core Installation), Windows Server 2019, Windows 10Jul 2022: 163 CVEs · 3 critical · 2 now in CISA KEV · rank #4 · mostly Microsoft Edge, Windows Server 2016, Windows Server Version 20h2Aug 2022: 126 CVEs · 3 critical · 1 now in CISA KEV · rank #5 · mostly Windows 10, Windows 10 21h2, Windows 10 20h2Sep 2022: 90 CVEs · 4 critical · 4 now in CISA KEV · rank #8 · mostly Windows Server 2022, Windows Server 2022 (Server Core Installation), Windows Server 2019 (Server Core Installation)Oct 2022: 94 CVEs · 1 critical · 4 now in CISA KEV · rank #3 · mostly Windows 11 Version 21h2, Windows 11, Windows Server 2022 (Server Core Installation)Nov 2022: 103 CVEs · 3 critical · 7 now in CISA KEV · rank #5 · mostly Windows Server 2022, Windows 11, Windows Server 2019Dec 2022: 55 CVEs · 0 critical · 2 now in CISA KEV · rank #16 · mostly Windows 10 Version 1809, Windows 11, Windows 10 Version 22h2Jan 2023: 109 CVEs · 0 critical · 1 now in CISA KEV · rank #3 · mostly Windows 11 Version 22h2, Windows 11 22h2, Windows 11 Version 21h2Feb 2023: 93 CVEs · 7 critical · 4 now in CISA KEV · rank #4 · mostly Windows 10 1809, Windows 10 20h2, Windows 10 21h2Mar 2023: not on the top 200 that monthApr 2023: 112 CVEs · 4 critical · 4 now in CISA KEV · rank #1 · mostly Windows Server 2022, Windows Server 2022 (Server Core Installation), Windows Server 2019 (Server Core Installation)May 2023: 61 CVEs · 3 critical · 2 now in CISA KEV · rank #11 · mostly Windows 11 21h2, Windows 10 20h2, Windows 10 21h2Jun 2023: 97 CVEs · 4 critical · 3 now in CISA KEV · rank #5 · mostly Windows Server 2022, Windows Server 2022 (Server Core Installation), Windows Server 2019 (Server Core Installation)Jul 2023: 143 CVEs · 5 critical · 5 now in CISA KEV · rank #3 · mostly Windows Server 2022 (Server Core Installation), Windows Server 2022, Windows Server 2019Aug 2023: 89 CVEs · 4 critical · 1 now in CISA KEV · rank #8 · mostly Windows 11 22h2, Windows 11 21h2, Windows 10 22h2Sep 2023: 67 CVEs · 1 critical · 5 now in CISA KEV · rank #9 · mostly Windows Server 2022, Windows Server 2022 (Server Core Installation), Windows 11 21h2Oct 2023: 118 CVEs · 5 critical · 4 now in CISA KEV · rank #3 · mostly Windows Server 2022, Windows Server 2019, Windows Server 2019 (Server Core Installation)Nov 2023: 83 CVEs · 3 critical · 5 now in CISA KEV · rank #5 · mostly Windows Server 2022, Windows 11 22h2, Windows 11 21h2Dec 2023: 54 CVEs · 4 critical · 1 now in CISA KEV · rank #12 · mostly Windows Server 2022, 23h2 Edition (Server Core Installation), Windows Server 2022, Windows Server 2019Jan 2024: 82 CVEs · 5 critical · 1 now in CISA KEV · rank #8 · mostly Windows Server 2022, Windows Server 2022, 23h2 Edition (Server Core Installation), Windows Server 2022 (Server Core Installation)Feb 2024: 90 CVEs · 9 critical · 5 now in CISA KEV · rank #7 · mostly Windows Server 2022, 23h2 Edition (Server Core Installation), Windows 11 23h2, Windows 11 22h2Mar 2024: 73 CVEs · 2 critical · 2 now in CISA KEV · rank #11 · mostly Windows 11 23h2, Windows 11 22h2, Windows Server 2022 (Server Core Installation)Apr 2024: 175 CVEs · 2 critical · 1 now in CISA KEV · rank #7 · mostly Windows Server 2022, 23h2 Edition (Server Core Installation), Windows Server 2022 (Server Core Installation), Windows Server 2022 23h2May 2024: 81 CVEs · 1 critical · 3 now in CISA KEV · rank #16 · mostly Windows Server 2022 (Server Core Installation), Windows Server 2022, Windows Server 2019Jun 2024: 85 CVEs · 2 critical · 3 now in CISA KEV · rank #10 · mostly Microsoft Edge, Windows Server 2019, Windows Server 2019 (Server Core Installation)Jul 2024: 159 CVEs · 9 critical · 3 now in CISA KEV · rank #8 · mostly Windows Server 2022, 23h2 Edition (Server Core Installation), Windows Server 2022 (Server Core Installation), Windows Server 2022Aug 2024: 144 CVEs · 10 critical · 8 now in CISA KEV · rank #7 · mostly Windows Server 2022, Windows Server 2022, 23h2 Edition (Server Core Installation), Windows Server 2022 (Server Core Installation)Sep 2024: 107 CVEs · 3 critical · 4 now in CISA KEV · rank #8 · mostly Windows Server 2022, 23h2 Edition (Server Core Installation), Windows Server 2022, Windows Server 2022 23h2Oct 2024: 152 CVEs · 2 critical · 3 now in CISA KEV · rank #8 · mostly Windows Server 2022, 23h2 Edition (Server Core Installation), Windows Server 2022 23h2, Windows Server 2019 (Server Core Installation)Nov 2024: 106 CVEs · 5 critical · 3 now in CISA KEV · rank #9 · mostly Windows Server 2022, Windows Server 2022 (Server Core Installation), Windows Server 2022 23h2Dec 2024: 91 CVEs · 3 critical · 1 now in CISA KEV · rank #10 · mostly Windows Server 2025, Windows Server 2025 (Server Core Installation), Windows Server 2022, 23h2 Edition (Server Core Installation)Jan 2025: 184 CVEs · 5 critical · 3 now in CISA KEV · rank #6 · mostly Windows Server 2022, 23h2 Edition (Server Core Installation), Windows Server 2025 (Server Core Installation), Windows Server 2025Feb 2025: 74 CVEs · 1 critical · 3 now in CISA KEV · rank #9 · mostly Windows Server 2025 (Server Core Installation), Windows Server 2025, Windows 11 Version 24h2Mar 2025: 70 CVEs · 1 critical · 8 now in CISA KEV · rank #14 · mostly Windows Server 2025, Windows Server 2022, 23h2 Edition (Server Core Installation), Windows Server 2022Apr 2025: 146 CVEs · 2 critical · 1 now in CISA KEV · rank #6 · mostly Windows Server 2025, Windows Server 2025 (Server Core Installation), Windows Server 2022May 2025: 85 CVEs · 5 critical · 5 now in CISA KEV · rank #12 · mostly Windows Server 2025 (Server Core Installation), Windows Server 2022 23h2, Windows Server 2022, 23h2 Edition (Server Core Installation)Jun 2025: 76 CVEs · 2 critical · 4 now in CISA KEV · rank #12 · mostly Windows Server 2025 (Server Core Installation), Windows Server 2025, Windows Server 2022Jul 2025: 149 CVEs · 5 critical · 4 now in CISA KEV · rank #11 · mostly Windows Server 2025 (Server Core Installation), Windows Server 2025, Windows Server 2022 23h2Aug 2025: 124 CVEs · 8 critical · 0 now in CISA KEV · rank #5 · mostly Windows Server 2025 (Server Core Installation), Windows Server 2025, Windows Server 2022, 23h2 Edition (Server Core Installation)Sep 2025: 109 CVEs · 5 critical · 1 now in CISA KEV · rank #11 · mostly Windows Server 2025, Windows Server 2025 (Server Core Installation), Windows Server 2022, 23h2 Edition (Server Core Installation)Oct 2025: 183 CVEs · 11 critical · 3 now in CISA KEV · rank #6 · mostly Windows Server 2025, Windows Server 2025 (Server Core Installation), Windows 11 24h2Nov 2025: 109 CVEs · 5 critical · 3 now in CISA KEV · rank #5 · mostly Windows 11 24h2, Windows 11 Version 24h2, Windows 11 25h2Dec 2025: 72 CVEs · 3 critical · 2 now in CISA KEV · rank #14 · mostly Windows Server 2025, Windows 11 Version 24h2, Windows 11 Version 25h2Jan 2026: 134 CVEs · 5 critical · 3 now in CISA KEV · rank #4 · mostly Windows 11 25h2, Windows Server 2025, Windows 11 24h2Feb 2026: 79 CVEs · 6 critical · 7 now in CISA KEV · rank #6 · mostly Windows Server 2025, Windows Server 2025 (Server Core Installation), Windows Server 2022 23h2Mar 2026: 144 CVEs · 7 critical · 2 now in CISA KEV · rank #6 · mostly Microsoft Edge, Windows 10 Version 21h2, Windows 10 Version 22h2Apr 2026: 185 CVEs · 15 critical · 3 now in CISA KEV · rank #3 · mostly Windows Server 2025 (Server Core Installation), Windows Server 2025, Windows Server 2022, 23h2 Edition (Server Core Installation)May 2026: 278 CVEs · 26 critical · 3 now in CISA KEV · rank #3 · mostly Microsoft Edge, Windows Server 2025 (Server Core Installation), Windows Server 2025Jun 2026: 265 CVEs · 19 critical · 0 now in CISA KEV · rank #3 · mostly Windows 11 26h1, Windows 11 Version 26h1, Windows Server 2025Jul 2026: 664 CVEs · 35 critical · 4 now in CISA KEV · rank #3 · mostly Windows Server 2025 (Server Core Installation), Windows Server 2025, Windows 11 Version 26h1Aug 2026: 479 CVEs · 35 critical · 1 now in CISA KEV · rank #3 · mostly Windows Server 2025 (Server Core Installation), Windows Server 2025, Windows 11 26h1Sep 2026 so far: 1,001 CVEs · 60 critical · 2 now in CISA KEV · rank #2 · mostly Windows Server 2025, Windows Server 2025 (Server Core Installation), Windows Server 2022
In the lens
The products that kept showing up in Microsoft's monthly top three from Oct 2021 to Sep 2026. Move the lens and the list follows.
- Windows Server 20252,464
- Windows Server 2025 (Server Core Installation)2,233
- Windows Server 20221,672
- Windows Server 2022, 23h2 Edition (Server Core Installation)952
- Windows Server 2022 (Server Core Installation)708
- Windows Server 2019498
- Windows 11 Version 26h1493
- Windows Server 2019 (Server Core Installation)443
- Windows Server 2022 23h2401
- Microsoft Edge344
Year by year
Each year's months on the top 200 list. Pick a year to read it in the lens.
The record
- Peak rank
- #1 in 31 months, last Apr 2023
- Busiest month
- Sep 2026, 1,001 CVEs
- Months with a KEV entry
- 147 of 240 on the list
- On the top 200 list
- 240 of 260 monthly snapshots