Intel

CVE-2026-50656

malware_protection_engine: Improper Link Resolution Before File Access ('Link Following') (CVE-2026-50656)

highPoCEPSS 0.4%

Description

Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ".

Source: BSI WID PortalBSI CSAFNVD (NIST)cvelistv5Microsoft Security Update Guide

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

microsoftmalware_protection_engine

Metrics

XIEM Effective CVSS
7.8
Source: cna-v3
EPSS percentile
28.6 %
Elevated — this CVE ranks above at least 10% of all CVEs scored today.
KEV status
—
Show all metrics
Severity
high
Priority score
65.70
Exploit maturity
PoC (publicly reported)
CVSS v3
7.8
EPSS score
0.4 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-06-16 18:01 UTC
CWE
CWE-59

Weakness classes (CWE)

  • CWE-59Base

    Improper Link Resolution Before File Access ('Link Following')

    The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

    cwe.mitre.org →

References & sources

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. CVE Modified2026-07-09 00:17 UTC· secure@microsoft.com
    • Affected: Microsoft Malware Protection Engine → Microsoft Malware Protection Engine
    • Description: Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as &quot;RoguePlanet &quot;. We are working to provide a high quality security update that addresses this vulnerability. We will provide information in this CVE when the update is available. → Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as &quot;RoguePlanet &quot;.
  2. New CVE Received2026-06-16 19:16 UTC· secure@microsoft.com
    • Description: Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as &quot;RoguePlanet &quot;. We are working to provide a high quality security update that addresses this vulnerability. We will provide information in this CVE when the update is available.
    • CVSS V3.1: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    • CWE: CWE-59
    • Reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50656

Linked advisories