High 7.8Known exploited (CISA KEV)Published Nov 11, 2020

CVE-2020-17087Windows Kernel Local Elevation of Privilege Vulnerability

Updated under an hour ago (Oct 28, 2026, 3:00 PM ET)

Does this affect you?

It affects Microsoft Windows 10 Version 1803 and 22 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by May 3, 2022. Treat that date as your deadline.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Microsoft Windows 10 Version 1803

Exploited in the last 30 days

Windows Kernel Local Elevation of Privilege Vulnerability

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
Weakness (CWE): CWE-131
Known exploited: Added to CISA KEV Nov 3, 2021; federal remediation due May 3, 2022Apply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 5.43% (percentile 93)
Assigned by: microsoft
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Microsoft Windows 10 Version 1803 microsoft:windows_10_1809	from 10.0.0 before publication	CNA record
Microsoft Windows 10 Version 1803 microsoft:windows_10_1803	from 10.0.0 before publication	CNA record
Microsoft Windows Server 2019 microsoft:windows_server_2019	from 10.0.0 before publication	CNA record
Microsoft Windows 10 Version 1909 microsoft:windows_10_1909	from 10.0.0 before publication	CNA record
Microsoft Windows Server, version 1909 (Server Core installation) microsoft:windows_server_1909	from 10.0.0 before publication	CNA record
Microsoft Windows 10 Version 1903 for 32-bit Systems microsoft:windows_10	from 10.0.0 before publication	CNA record
Microsoft Windows Server, version 1903 (Server Core installation) microsoft:windows_server_1903	from 10.0.0 before publication	CNA record
Microsoft Windows Server version 2004 microsoft:windows_server_2004	from 10.0.0 before publication	CNA record
Microsoft Windows 10 Version 20H2 microsoft:windows_10_20h2	from 10.0.0 before publication	CNA record
Microsoft Windows Server version 20H2 microsoft:windows_server_20h2	from 10.0.0 before publication	CNA record
1–10 of 35

References

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17087	x-refsource-misc, patch, vendor-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-17087	us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.