CVE-2026-20817

high

Description

Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an authorized attacker to elevate privileges locally.

References

https://github.com/dwgth4i/CVE-2026-20817

https://www.vicarius.io/vsociety/posts/cve-2026-20817-mitigation-script-eop-vulnerability-in-windows-error-reporting

https://www.vicarius.io/vsociety/posts/cve-2026-20817-detection-script-eop-vulnerabilit-in-windows-error-reporting

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20817

Details

Source: Mitre, NVD

Published: 2026-01-13

Updated: 2026-07-30

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00056