CVE-2026-55011
Microsoft Defender Remote Code Execution Vulnerability
- State
- Published
- Severity
- 7.8 High
- Published
- Jul 14, 2026
- Updated
- Nov 1, 2026
- Reserved
- Jun 16, 2026
Description
Integer underflow (wrap or wraparound) in Microsoft Defender allows an unauthorized attacker to execute code locally.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | 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 | microsoft |
Weaknesses
- CWE-191 Integer Underflow (Wrap or Wraparound)
Affected Products
| Product | Versions |
|---|---|
Microsoft Malware Protection EngineMicrosoft |
|
References
- Microsoft Defender Remote Code Execution Vulnerabilityvendor-advisorypatch
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