CVE-2026-55011— Microsoft Defender Remote Code Execution Vulnerability
Quick assessment
Affected
Microsoft Microsoft Malware Protection Engine
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Microsoft malware protection engine是美国Microsoft公司的一套恶意软件防护检测引擎。 Microsoft Malware Protection Engine 1.1.26060.3008之前版本存在数字错误漏洞，该漏洞源于整数下溢，可能导致未经授权的攻击者在本地执行代码。
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client ExecutionAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Microsoft Malware Protection Engine | 1.1.0.0< 1.1.26060.3008 |
affected |
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-55011
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Microsoft Defender Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Integer underflow (wrap or wraparound) in Microsoft Defender allows an unauthorized attacker to execute code locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Malware Protection Engine 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft malware protection engine是美国Microsoft公司的一套恶意软件防护检测引擎。 Microsoft Malware Protection Engine 1.1.26060.3008之前版本存在数字错误漏洞，该漏洞源于整数下溢，可能导致未经授权的攻击者在本地执行代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Microsoft | Microsoft Malware Protection Engine | 1.1.0.0 ~ 1.1.26060.3008 | - |
|
II. Public POCs for CVE-2026-55011
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-55011
请登录查看更多情报信息。
Vendor Advisories for CVE-2026-55011 (1)
Same Patch Batch · Microsoft · 2026-07-14 · 570 CVEs total
| CVE-2026-57092 | 9.9 CRITICAL | Microsoft Windows VMSwitch Elevation of Privilege Vulnerability |
| CVE-2026-50518 | 9.8 CRITICAL | Windows DHCP Server Remote Code Execution Vulnerability |
| CVE-2026-55010 | 9.8 CRITICAL | Minecraft Bedrock Dedicated Server Remote Code Execution Vulnerability |
| CVE-2026-50447 | 9.8 CRITICAL | Windows Message Queuing Service (MSMQ) Remote Code Execution Vulnerability |
| CVE-2026-42990 | 9.8 CRITICAL | SQL Server ODBC driver Elevation of Privilege Vulnerability |
| CVE-2026-55944 | 9.8 CRITICAL | Microsoft Dynamics NAV and Microsoft Dynamics 365 Business Central (On Premises) Remote Co |
| CVE-2026-56159 | 9.8 CRITICAL | DHCP Server Service Remote Code Execution Vulnerability |
| CVE-2026-56190 | 9.8 CRITICAL | Remote Desktop Protocol Remote Code Execution Vulnerability |
| CVE-2026-56188 | 9.8 CRITICAL | Windows Server Network driver Remote Code Execution Vulnerability |
| CVE-2026-58644 | 9.8 CRITICAL | Microsoft SharePoint Remote Code Execution Vulnerability |
| CVE-2026-50522 | 9.8 CRITICAL | Microsoft SharePoint Remote Code Execution Vulnerability |
| CVE-2026-54118 | 9.8 CRITICAL | Microsoft SQL Server Remote Code Execution Vulnerability |
| CVE-2026-54117 | 9.8 CRITICAL | Microsoft SQL Server Remote Code Execution Vulnerability |
| CVE-2026-54990 | 9.8 CRITICAL | Remote Desktop Client Remote Code Execution Vulnerability |
| CVE-2026-49172 | 9.8 CRITICAL | Windows FTP Service Remote Code Execution Vulnerability |
| CVE-2026-48561 | 9.6 CRITICAL | Microsoft Edge Copilot Remote Code Execution Vulnerability |
| CVE-2026-50380 | 9.6 CRITICAL | Windows GDI+ Remote Code Execution Vulnerability |
| CVE-2026-55008 | 9.6 CRITICAL | Microsoft Exchange Server Spoofing Vulnerability |
| CVE-2026-49798 | 9.3 CRITICAL | Windows Kernel Elevation of Privilege Vulnerability |
| CVE-2026-55040 | 9.1 CRITICAL | Microsoft SharePoint Server Security Feature Bypass Vulnerability |
Showing top 20 of 570 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Microsoft Malware Protection Engine
-
CVE-2026-69414
Microsoft Defender Elevation of Privilege Vulnerability -
CVE-2026-55012
Microsoft Defender Remote Code Execution Vulnerability -
CVE-2026-50656
Microsoft Defender Elevation of Privilege Vulnerability -
CVE-2026-45584
Microsoft Defender Remote Code Execution Vulnerability -
CVE-2026-41091
Microsoft Defender Elevation of Privilege Vulnerability
Same vendor: Microsoft
-
CVE-2026-62316
Microsoft UFO: DNS Rebinding → Unauthenticated File Read / C -
CVE-2026-69502
Azure SQL Database Elevation of Privilege Vulnerability -
CVE-2026-69855
Microsoft Copilot in Azure Information Disclosure Vulnerabil -
CVE-2026-69543
Azure Virtual Machines Elevation of Privilege Vulnerability -
CVE-2026-69558
Microsoft Partner Center Information Disclosure Vulnerabilit
Same weakness: CWE-191
-
CVE-2026-16924
Vulnerabilities in IBM AIX and PowerVM VIOS -
CVE-2026-58087
Heap out-of-bounds access in semctl(2) -
CVE-2026-62289
libheif: Integer underflow in Fraction constructor via doubl -
CVE-2026-45698
Netatalk has Integer Underflow → Stack Buffer Overflow in de -
CVE-2026-45699
Netatalk has Integer Underflow → Stack Buffer Overflow in co
V. Comments for CVE-2026-55011
No comments yet