CVE-2026-50656
Microsoft Defender Elevation of Privilege Vulnerability
Description
Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ". 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.
INFO
Published Date :
June 16, 2026, 7:16 p.m.
Last Modified :
June 17, 2026, 7:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | f38d906d-7342-40ea-92c1-6c4a2c6478c8 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Public PoC/Exploit Available at Github
CVE-2026-50656 has a 5 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-50656.
| URL | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50656 | Vendor Advisory |
| https://github.com/MSNightmare/RoguePlanet | Product |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-50656 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-50656
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
PowerShell
CVE-2026-50656
C++
None
YARA
This repository contains a curated collection of Kusto Query Language (KQL) queries designed for use in Microsoft Defender Advanced Hunting and related security analytics platforms. The primary focus is on detecting zero-day attacks, including previously unknown threats that bypass traditional signature-based detection.
SecDB - Security Feeds
cve security-feeds vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-50656 vulnerability anywhere in the article.
-
The Cyber Express
The Cyber Express Weekly Roundup: Cybersecurity Weekly Round on Emerging Threats, Data Breaches, and Global Policy Shifts
This week’s weekly roundup of cybersecurity developments highlights an expanding intersection of cyber risk, regulatory action, and enterprise vulnerability. Across healthcare, technology platforms, g ... Read more
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The Cyber Express
CVE-2026-48907 and LiteSpeed cPanel Plugin Flaws Come Under Active Attack
Security researchers and software vendors warn that attackers are actively exploiting vulnerabilities in both Joomla and the LiteSpeed cPanel plugin, posing significant risks to website administrators ... Read more
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The Cyber Express
Windows Defender Vulnerability Exposed as RoguePlanet PoC Spreads Online
A newly disclosed Windows Defender vulnerability, tracked as CVE-2026-50656 and dubbed RoguePlanet, has raised concerns across the cybersecurity community after a working proof-of-concept (PoC) exploi ... Read more
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The Hacker News
Microsoft Confirms RoguePlanet Defender Zero-Day, Says Patch is in Development
Microsoft has formally disclosed that it's working to release a patch to address a Defender zero-day codenamed RoguePlanet. The vulnerability has now been assigned the CVE identifier CVE-2026-50656 (C ... Read more
-
TheCyberThrone
RoguePlanet Zero-Day – Microsoft Defender
June 17, 2026A new local privilege escalation zero-day has been disclosed in the Microsoft Malware Protection Engine — the core component powering Microsoft Defender Antivirus and System Center Endpoi ... Read more
-
security.nl
Microsoft verwacht misbruik van 'RoguePlanet-lek' in Defender, werkt aan update
Microsoft verwacht dat aanvallers misbruik zullen maken van een kwetsbaarheid in de in Windows ingebouwde antivirussoftware Defender waardoor systemen volledig zijn over te nemen. Het beveiligingslek ... Read more
The following table lists the changes that have been made to the
CVE-2026-50656 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:microsoft:malware_protection_engine:-:*:*:*:*:*:*:* Added Reference Type Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50656 Types: Vendor Advisory Added Reference Type CISA-ADP: https://github.com/MSNightmare/RoguePlanet Types: Product -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-50656', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-16T18:39:17.896626Z'} {'id': 'CVE-2026-50656', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-16T00:00:00+00:00'} -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Microsoft', 'product': 'Microsoft Malware Protection Engine', 'versions': [{'status': 'affected', 'version': '-'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-50656', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-16T18:39:17.896626Z'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 16, 2026
Action Type Old Value New Value Added Reference https://github.com/MSNightmare/RoguePlanet -
New CVE Received by [email protected]
Jun. 16, 2026
Action Type Old Value New Value Added Description Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "RoguePlanet ". 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. Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-59 Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50656