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
This vulnerability involves an integer overflow or wraparound condition in Microsoft Malware Protection Engine (version 1.1.0.0). Exploitation could allow an unauthorized attacker to execute code locally on the affected system. The CVSS v3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability could lead to local code execution by an unauthorized attacker, potentially compromising system confidentiality, integrity, and availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the patch provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55012 to remediate this vulnerability.
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
This vulnerability involves an integer overflow or wraparound condition in Microsoft Malware Protection Engine (version 1.1.0.0). Exploitation could allow an unauthorized attacker to execute code locally on the affected system. The CVSS v3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation of this vulnerability could lead to local code execution by an unauthorized attacker, potentially compromising system confidentiality, integrity, and availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the patch provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55012 to remediate this vulnerability.
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: 08/13/2026, 15:28:34 UTC
Last updated: 08/27/2026, 11:04:03 UTC
Views: 49
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