CVE-2026-69414
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 "ShieldBreak ".
INFO
Published Date :
Aug. 14, 2026, 10:17 p.m.
Last Modified :
Sept. 3, 2026, 10:18 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] |
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-2026-69414.
| URL | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69414 | Vendor Advisory |
| https://github.com/MSNightmare/ShieldBreak |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-69414 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-2026-69414
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-69414 vulnerability anywhere in the article.
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Dark Reading
Nightmare-Eclipse Strikes Again with 'ShieldCrash' Windows Exploit
4 Min ReadSource: Andriy Popov via Alamy Stock PhotoOn the heels of a record-breaking Patch Tuesday, the disgruntled security researcher known as Nightmare-Eclipse dropped yet another Windows zero-day ... Read more
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security.nl
Microsoft dicht bijna duizend beveiligingslekken tijdens patchdinsdag september
Microsoft heeft tijdens de patchdinsdag van september bijna duizend beveiligingslekken verholpen, waaronder twee kwetsbaarheden die al voor het uitkomen van de patches werden misbruikt bij aanvallen t ... Read more
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The Hacker News
Researcher Drops New Microsoft Defender PoC Showing ShieldBreak Patch Can Be Bypassed
The security researcher known as Chaotic Eclipse has dropped a proof-of-concept (PoC) for yet another zero-day in Microsoft Defender. The vulnerability, codenamed ShieldCrash, is assessed to be a patc ... Read more
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CrowdStrike.com
September 2026 Patch Tuesday: Two Exploited Zero-Days and 113 Critical Vulnerabilities Among 972 CVEs
Microsoft has addressed 972 vulnerabilities in its September 2026 security update release, over double the number of CVEs released in August, and a new Patch Tuesday record. This month's patches inclu ... Read more
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The Hacker News
Researcher Releases FalconFlank PoC Showing Privilege Escalation in CrowdStrike Falcon
The security researcher known as Chaotic Eclipse (aka INFINITE NIGHTMARE, MSNightmare, and Nightmare-Eclipse) has dropped a new zero-day dubbed FalconFlank, a privilege escalation flaw impacting Crowd ... Read more
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security.nl
Microsoft werkt aan update voor ShieldBreak-lek in Windows Defender
Microsoft werkt aan een beveiligingsupdate voor een kwetsbaarheid in Microsoft Defender, de in Windows ingebouwde antivirussoftware. Via het beveiligingslek, genaamd 'ShieldBreak', kan een aanvaller d ... Read more
The following table lists the changes that have been made to the
CVE-2026-69414 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.
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CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 03, 2026
Action Type Old Value New Value Added Reference https://github.com/MSNightmare/ShieldBreak Removed Reference https://github.com/MSNightmare/ShieldBreak -
CVE Modified by [email protected]
Sep. 03, 2026
Action Type Old Value New Value Changed Description Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "ShieldBreak ". 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 "ShieldBreak ". Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/69xxx/CVE-2026-69414.json">CVE-2026-69414</a> Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69414 Removed Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69414 Removed Reference Type https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69414 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 20, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-69414', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-18T03:55:20.678880Z'} {'id': 'CVE-2026-69414', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-17T00:00:00+00:00'} -
CVE Modified by [email protected]
Aug. 19, 2026
Action Type Old Value New Value Added CWE CWE-284 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 18, 2026
Action Type Old Value New Value Added CWE CWE-269 Added Reference https://github.com/MSNightmare/ShieldBreak Changed SSVC {'id': 'CVE-2026-69414', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-17T00:00:00+00:00'} {'id': 'CVE-2026-69414', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-18T03:55:20.678880Z'} -
Initial Analysis by [email protected]
Aug. 18, 2026
Action Type Old Value New Value Added CWE NVD-CWE-noinfo 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-2026-69414 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 18, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-69414', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-17T00:00:00+00:00'} -
New CVE Received by [email protected]
Aug. 14, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Microsoft', 'product': 'Microsoft Malware Protection Engine', 'versions': [{'status': 'affected', 'version': '-'}]}] Added Description Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "ShieldBreak ". 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 Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69414