Windows 10/11 vulnerabilities: known CVEs & security history
Microsoft · Microsoft · 53 tracked CVEs · 0 actively exploited · updated September 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Windows 10/11 release lines — 53 in total. A CVE here doesn't mean your version is affected — check Windows 10/11's current status and the safe version to run.
Known Windows 10/11 CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2021-26443 | critical | 9 | 2% | 2021 |
| CVE-2022-41048 | high | 8.8 | 1% | 2022 |
| CVE-2022-41047 | high | 8.8 | 1% | 2022 |
| CVE-2021-42283 | high | 8.8 | 0% | 2021 |
| CVE-2021-42275 | high | 8.8 | 2% | 2021 |
| CVE-2021-38666 | high | 8.8 | 13% | 2021 |
| CVE-2022-41088 | high | 8.1 | 1% | 2022 |
| CVE-2022-41039 | high | 8.1 | 1% | 2022 |
| CVE-2022-41113 | high | 7.8 | 9% | 2022 |
| CVE-2022-41109 | high | 7.8 | 8% | 2022 |
| CVE-2022-41102 | high | 7.8 | 1% | 2022 |
| CVE-2022-41101 | high | 7.8 | 1% | 2022 |
| CVE-2022-41100 | high | 7.8 | 0% | 2022 |
| CVE-2022-41096 | high | 7.8 | 1% | 2022 |
| CVE-2022-41095 | high | 7.8 | 0% | 2022 |
| CVE-2022-41093 | high | 7.8 | 0% | 2022 |
| CVE-2022-41092 | high | 7.8 | 1% | 2022 |
| CVE-2022-41057 | high | 7.8 | 1% | 2022 |
| CVE-2022-41054 | high | 7.8 | 0% | 2022 |
| CVE-2022-41052 | high | 7.8 | 1% | 2022 |
| CVE-2022-41050 | high | 7.8 | 1% | 2022 |
| CVE-2022-41045 | high | 7.8 | 0% | 2022 |
| CVE-2022-37992 | high | 7.8 | 0% | 2022 |
| CVE-2021-42285 | high | 7.8 | 0% | 2021 |
| CVE-2021-42276 | high | 7.8 | 2% | 2021 |
| CVE-2021-41378 | high | 7.8 | 1% | 2021 |
| CVE-2021-41377 | high | 7.8 | 0% | 2021 |
| CVE-2021-41370 | high | 7.8 | 0% | 2021 |
| CVE-2021-41367 | high | 7.8 | 0% | 2021 |
| CVE-2021-41366 | high | 7.8 | 0% | 2021 |
| CVE-2022-41118 | high | 7.5 | 1% | 2022 |
| CVE-2022-41058 | high | 7.5 | 2% | 2022 |
| CVE-2022-41056 | high | 7.5 | 2% | 2022 |
| CVE-2022-41053 | high | 7.5 | 2% | 2022 |
| CVE-2021-41356 | high | 7.5 | 3% | 2021 |
| CVE-2021-38665 | high | 7.4 | 6% | 2021 |
| CVE-2022-41114 | high | 7 | 1% | 2022 |
| CVE-2021-42284 | medium | 6.8 | 3% | 2021 |
| CVE-2021-42274 | medium | 6.8 | 1% | 2021 |
| CVE-2022-41097 | medium | 6.5 | 1% | 2022 |
| CVE-2022-38015 | medium | 6.5 | 1% | 2022 |
| CVE-2022-41086 | medium | 6.4 | 0% | 2022 |
| CVE-2022-41090 | medium | 5.9 | 1% | 2022 |
| CVE-2022-41064 | medium | 5.8 | 1% | 2022 |
| CVE-2022-41098 | medium | 5.5 | 1% | 2022 |
| CVE-2022-41055 | medium | 5.5 | 1% | 2022 |
| CVE-2021-42280 | medium | 5.5 | 1% | 2021 |
| CVE-2021-42277 | medium | 5.5 | 1% | 2021 |
| CVE-2022-41099 | medium | 4.6 | 4% | 2022 |
| CVE-2021-41371 | medium | 4.4 | 1% | 2021 |
| CVE-2021-38631 | medium | 4.4 | 2% | 2021 |
| CVE-2021-41351 | medium | 4.3 | 4% | 2021 |
| CVE-2021-42279 | medium | 4.2 | 2% | 2021 |
Is my Windows 10/11 version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your Windows 10/11 version → · Monitor Windows 10/11 for new CVEs →
Windows 10/11 vulnerabilities — frequently asked
How many known vulnerabilities does Windows 10/11 have?
IsItPatched tracks 53 CVEs for Windows 10/11. 1 is critical-severity and 36 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Windows 10/11 have any actively-exploited vulnerabilities?
None of Windows 10/11's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe Windows 10/11 vulnerability?
Among tracked issues, CVE-2021-26443 (CRITICAL, CVSS 9) ranks highest.
Is Windows 10/11 safe to use?
It depends on the version. The latest supported Windows 10/11 release (10.0.28000) clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: Windows 10/11 security status · Windows 10/11 end-of-life · actively-exploited CVEs. Always verify against Microsoft's advisories — see our disclaimer.