CVE-2026-45584: CWE-122: Heap-based Buffer Overflow in Microsoft Microsoft Malware Protection Engine
Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-45584) involves a heap-based buffer overflow in the Microsoft Malware Protection Engine, which could be exploited by an attacker to execute arbitrary code remotely without requiring user interaction or privileges. The vulnerability is classified under CWE-122 and has a CVSS 3.1 base score of 8.1, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official patch to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code remotely on affected systems, potentially leading to full system compromise. The vulnerability impacts confidentiality, integrity, and availability of the affected system components.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45584 to remediate this vulnerability.
CVE-2026-45584: CWE-122: Heap-based Buffer Overflow in Microsoft Microsoft Malware Protection Engine
Description
Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-45584) involves a heap-based buffer overflow in the Microsoft Malware Protection Engine, which could be exploited by an attacker to execute arbitrary code remotely without requiring user interaction or privileges. The vulnerability is classified under CWE-122 and has a CVSS 3.1 base score of 8.1, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official patch to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code remotely on affected systems, potentially leading to full system compromise. The vulnerability impacts confidentiality, integrity, and availability of the affected system components.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45584 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T19:55:45.729Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45584","vendor":"Microsoft"}]
Threat ID: 6a0db4dcba1db473627ecd81
Added to database: 5/20/2026, 1:19:24 PM
Last enriched: 5/20/2026, 1:34:01 PM
Last updated: 5/21/2026, 6:02:49 AM
Views: 3
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