CVE-2026-55012: CWE-190: Integer Overflow or Wraparound in Microsoft Microsoft Malware Protection Engine
Integer overflow or wraparound in Microsoft Defender allows an unauthorized attacker to execute code locally.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-55012 involves an integer overflow or wraparound condition in Microsoft Malware Protection Engine version 1.1.0.0. This flaw can be exploited by an unauthorized attacker to achieve local code execution. The vulnerability has been assigned a CVSS v3.1 base score of 7.8, indicating high severity, with impacts on confidentiality, integrity, and availability. Microsoft has released an official patch to remediate this issue, as documented in their security update guide.
Potential Impact
Successful exploitation of this vulnerability allows an attacker without privileges to execute arbitrary code locally, potentially leading to full compromise of the affected system's confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the security update provided by Microsoft as soon as possible to remediate the issue. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55012 for detailed patch information and update instructions.
CVE-2026-55012: CWE-190: Integer Overflow or Wraparound in Microsoft Microsoft Malware Protection Engine
Description
Integer overflow or wraparound in Microsoft Defender allows an unauthorized attacker to execute code locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-55012 involves an integer overflow or wraparound condition in Microsoft Malware Protection Engine version 1.1.0.0. This flaw can be exploited by an unauthorized attacker to achieve local code execution. The vulnerability has been assigned a CVSS v3.1 base score of 7.8, indicating high severity, with impacts on confidentiality, integrity, and availability. Microsoft has released an official patch to remediate this issue, as documented in their security update guide.
Potential Impact
Successful exploitation of this vulnerability allows an attacker without privileges to execute arbitrary code locally, potentially leading to full compromise of the affected system's confidentiality, integrity, and availability.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the security update provided by Microsoft as soon as possible to remediate the issue. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55012 for detailed patch information and update instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-16T14:12:44.283Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55012","vendor":"Microsoft"}]
Threat ID: 6a566f8068715ace43e6bf73
Added to database: 07/14/2026, 17:18:56 UTC
Last enriched: 07/14/2026, 17:48:29 UTC
Last updated: 07/14/2026, 20:03:47 UTC
Views: 3
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