Windows Server 2019 vulnerabilities: known CVEs & security history
Microsoft · Operating System · 3158 tracked CVEs · 105 actively exploited · updated September 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Windows Server 2019 release lines — 3158 in total, with 105 actively exploited in the wild. A CVE here doesn't mean your version is affected — check Windows Server 2019's current status and the safe version to run.
Known Windows Server 2019 CVEs
Actively-exploited and most-severe first. Showing the top 80 of 3158. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2020-1350⚡ exploited | critical | 10 | 92% | 2020 |
| CVE-2026-33824⚡ exploited | critical | 9.8 | 56% | 2026 |
| CVE-2020-0646⚡ exploited | critical | 9.8 | 99% | 2020 |
| CVE-2024-49039⚡ exploited | high | 8.8 | 14% | 2024 |
| CVE-2024-43461⚡ exploited | high | 8.8 | 52% | 2024 |
| CVE-2022-41128⚡ exploited | high | 8.8 | 25% | 2022 |
| CVE-2021-40444⚡ exploited | high | 8.8 | 97% | 2021 |
| CVE-2021-34527⚡ exploited | high | 8.8 | 100% | 2021 |
| CVE-2021-27085⚡ exploited | high | 8.8 | 4% | 2021 |
| CVE-2021-26411⚡ exploited | high | 8.8 | 81% | 2021 |
| CVE-2020-1020⚡ exploited | high | 8.8 | 65% | 2020 |
| CVE-2019-0903⚡ exploited | high | 8.8 | 22% | 2019 |
| CVE-2019-0541⚡ exploited | high | 8.8 | 53% | 2019 |
| CVE-2024-21412⚡ exploited | high | 8.1 | 95% | 2024 |
| CVE-2020-0601⚡ exploited | high | 8.1 | 89% | 2020 |
| CVE-2026-85880⚡ exploited | high | 7.8 | — | 2026 |
| CVE-2026-56155⚡ exploited | high | 7.8 | 0% | 2026 |
| CVE-2024-38014⚡ exploited | high | 7.8 | 6% | 2024 |
| CVE-2024-35250⚡ exploited | high | 7.8 | 25% | 2024 |
| CVE-2024-21338⚡ exploited | high | 7.8 | 60% | 2024 |
| CVE-2023-21823⚡ exploited | high | 7.8 | 6% | 2023 |
| CVE-2023-23376⚡ exploited | high | 7.8 | 11% | 2023 |
| CVE-2022-41125⚡ exploited | high | 7.8 | 3% | 2022 |
| CVE-2022-41073⚡ exploited | high | 7.8 | 2% | 2022 |
| CVE-2022-37969⚡ exploited | high | 7.8 | 28% | 2022 |
| CVE-2022-30190⚡ exploited | high | 7.8 | 99% | 2022 |
| CVE-2021-43226⚡ exploited | high | 7.8 | 3% | 2021 |
| CVE-2021-40450⚡ exploited | high | 7.8 | 2% | 2021 |
| CVE-2021-40449⚡ exploited | high | 7.8 | 74% | 2021 |
| CVE-2021-36955⚡ exploited | high | 7.8 | 3% | 2021 |
| CVE-2021-36948⚡ exploited | high | 7.8 | 20% | 2021 |
| CVE-2021-34486⚡ exploited | high | 7.8 | 7% | 2021 |
| CVE-2021-34484⚡ exploited | high | 7.8 | 16% | 2021 |
| CVE-2021-33771⚡ exploited | high | 7.8 | 6% | 2021 |
| CVE-2021-31979⚡ exploited | high | 7.8 | 3% | 2021 |
| CVE-2021-31956⚡ exploited | high | 7.8 | 20% | 2021 |
| CVE-2021-1675⚡ exploited | high | 7.8 | 85% | 2021 |
| CVE-2021-28310⚡ exploited | high | 7.8 | 8% | 2021 |
| CVE-2021-1732⚡ exploited | high | 7.8 | 78% | 2021 |
| CVE-2021-1647⚡ exploited | high | 7.8 | 40% | 2021 |
| CVE-2020-17087⚡ exploited | high | 7.8 | 5% | 2020 |
| CVE-2020-1464⚡ exploited | high | 7.8 | 41% | 2020 |
| CVE-2020-1380⚡ exploited | high | 7.8 | 24% | 2020 |
| CVE-2020-1147⚡ exploited | high | 7.8 | 96% | 2020 |
| CVE-2020-0986⚡ exploited | high | 7.8 | 16% | 2020 |
| CVE-2020-1027⚡ exploited | high | 7.8 | 4% | 2020 |
| CVE-2020-0938⚡ exploited | high | 7.8 | 69% | 2020 |
| CVE-2020-0787⚡ exploited | high | 7.8 | 43% | 2020 |
| CVE-2020-0683⚡ exploited | high | 7.8 | 8% | 2020 |
| CVE-2020-0638⚡ exploited | high | 7.8 | 3% | 2020 |
| CVE-2019-1405⚡ exploited | high | 7.8 | 30% | 2019 |
| CVE-2019-1388⚡ exploited | high | 7.8 | 9% | 2019 |
| CVE-2019-1385⚡ exploited | high | 7.8 | 4% | 2019 |
| CVE-2019-1322⚡ exploited | high | 7.8 | 19% | 2019 |
| CVE-2019-1315⚡ exploited | high | 7.8 | 3% | 2019 |
| CVE-2019-1253⚡ exploited | high | 7.8 | 12% | 2019 |
| CVE-2019-1215⚡ exploited | high | 7.8 | 19% | 2019 |
| CVE-2019-1214⚡ exploited | high | 7.8 | 1% | 2019 |
| CVE-2019-1130⚡ exploited | high | 7.8 | 2% | 2019 |
| CVE-2019-1129⚡ exploited | high | 7.8 | 2% | 2019 |
| CVE-2019-0880⚡ exploited | high | 7.8 | 2% | 2019 |
| CVE-2019-1069⚡ exploited | high | 7.8 | 6% | 2019 |
| CVE-2019-1064⚡ exploited | high | 7.8 | 7% | 2019 |
| CVE-2019-0863⚡ exploited | high | 7.8 | 5% | 2019 |
| CVE-2019-0859⚡ exploited | high | 7.8 | 4% | 2019 |
| CVE-2019-0841⚡ exploited | high | 7.8 | 42% | 2019 |
| CVE-2019-0803⚡ exploited | high | 7.8 | 45% | 2019 |
| CVE-2019-0797⚡ exploited | high | 7.8 | 2% | 2019 |
| CVE-2019-0543⚡ exploited | high | 7.8 | 5% | 2019 |
| CVE-2018-8639⚡ exploited | high | 7.8 | 22% | 2018 |
| CVE-2018-8611⚡ exploited | high | 7.8 | 4% | 2018 |
| CVE-2018-8453⚡ exploited | high | 7.8 | 70% | 2018 |
| CVE-2024-21351⚡ exploited | high | 7.6 | 30% | 2024 |
| CVE-2023-44487⚡ exploited | high | 7.5 | 100% | 2023 |
| CVE-2023-36884⚡ exploited | high | 7.5 | 99% | 2023 |
| CVE-2021-42287⚡ exploited | high | 7.5 | 74% | 2021 |
| CVE-2021-42278⚡ exploited | high | 7.5 | 70% | 2021 |
| CVE-2021-36942⚡ exploited | high | 7.5 | 66% | 2021 |
| CVE-2021-33742⚡ exploited | high | 7.5 | 59% | 2021 |
| CVE-2020-0968⚡ exploited | high | 7.5 | 30% | 2020 |
3078 older / lower-severity CVEs not shown — see Windows Server 2019's full record.
Is my Windows Server 2019 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 Server 2019 version → · Monitor Windows Server 2019 for new CVEs →
Windows Server 2019 vulnerabilities — frequently asked
How many known vulnerabilities does Windows Server 2019 have?
IsItPatched tracks 3158 CVEs for Windows Server 2019, 105 of which are actively exploited (CISA KEV). 77 are critical-severity and 2234 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Windows Server 2019 have any actively-exploited vulnerabilities?
Yes — 105 Windows Server 2019 CVEs are in CISA's Known Exploited Vulnerabilities catalog, meaning they are confirmed exploited in the wild (45 linked to ransomware). Patch these as a priority.
What is the most severe Windows Server 2019 vulnerability?
Among tracked issues, CVE-2020-1350 (CRITICAL, CVSS 10), which is actively exploited, ranks highest — a Improper input validation weakness.
Is Windows Server 2019 safe to use?
It depends on the version. The latest supported Windows Server 2019 release (10.0.26100) 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 Server 2019 security status · Windows Server 2019 end-of-life · actively-exploited CVEs. Always verify against Microsoft's advisories — see our disclaimer.