CVE-2021-26870 evidence review
Microsoft Windows 10 Version 1803, Windows 10 Version 1809, Windows 10 Version 1909
CVE-2021-26870 affects Microsoft Windows 10 Version 1803, Windows 10 Version 1809, Windows 10 Version 1909. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.
This record remains available for product and version identification, but it is not presented as a complete remediation procedure. Confirm the affected range and the supported fix in a direct vendor advisory before changing production systems.
Identify the product and installed version
Record whether Microsoft Windows 10 Version 1803, Windows 10 Version 1809, Windows 10 Version 1909 is present, where it is installed, and which interfaces are exposed.
- Record the product name, package or appliance identifier, and installed version.
- Identify internet-facing, administrative, API, and internal access paths.
- Preserve the pre-change configuration and relevant service logs.
Compare the affected range
Use the current record as an identification aid: >= 10.0.0 < 10.0.17134.2087, >= 10.0.17763.0 < 10.0.17763.1817, >= 10.0.0 < 10.0.17763.1817, >= 10.0.0 < 10.0.18363.1440, >= 10.0.0 < 10.0.19043.867, 20h2, 1803, 1809, 1909, 2004. Resolve incomplete inventory results before deciding that an asset is unaffected.
Verify the authoritative remediation source
Open the linked source material and locate a direct vendor advisory for this CVE. Confirm the supported fixed release and product-specific update path before making a production change.
Operational boundary
This page does not replace the vendor advisory, support contract, change-management process, or recovery plan. Do not infer that an asset is unaffected from an incomplete inventory query or a missing fixed-version field.