CVE intelligence and bounded remediation

CVE-2020-0989 — <p>An information disclosure vulnerability exists when Windows Mobile Device Management (MDM) Diagnostics improperly handles junctions

Medium CVSS 5.5

<p>An information disclosure vulnerability exists when Windows Mobile Device Management (MDM) Diagnostics improperly handles junctions. An attacker who successfully exploited this vulnerability could bypass access restrictions to read files.</p> <p>To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and access files.</p> <p>The security update addresses the vulnerability by correcting the how Windows MDM Diagnostics handles files.</p>

Severity
Medium
CVSS
5.5 (3.1)
Published
2020-09-11
CISA KEV
Not currently listed
Ecosystem
windows/system
Weaknesses
CWE-862

Affected products

  • microsoft / windows_10 / 1709
  • microsoft / windows_10 / 1803
  • microsoft / windows_10 / 1809
  • microsoft / windows_10 / 1903
  • microsoft / windows_10 / 1909
  • microsoft / windows_10 / 2004

Showing 6 representative product identities from 10 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authorization bypass, IDOR, and cross-tenant access

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map object and action authorization checks across API, UI, batch, import/export, and background-job paths.
  • Identify tenant, ownership, role, and policy boundaries for affected resources and administrative operations.
  • Use synthetic fixtures to compare intended access matrices without accessing another user's real data.

Remediate safely

  • Enforce server-side authorization at each resource access and state transition using the authenticated principal and trusted tenant context.
  • Scope data queries by tenant and ownership; treat client-supplied identifiers, roles, and policy claims as untrusted.
  • Add deny-by-default policy tests for horizontal and vertical access across every affected transport.

Authoritative sources

Complete CVE record and remediation plan

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