CVE-2026-55011
Microsoft Defender Remote Code Execution Vulnerability
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
Integer underflow (wrap or wraparound) in Microsoft Defender allows an unauthorized attacker to execute code locally.
| Vendor | microsoft |
| Product | microsoft malware protection engine |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Jul 14, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / Microsoft Malware Protection Engine
1.1.0.0 < 1.1.26060.3008