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 Microsoft Malware Protection Engine version 1.1.0.0. Exploitation could allow an attacker to execute arbitrary code remotely without user interaction and without privileges. The vulnerability is classified under CWE-122. Microsoft has published an official fix to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability could lead to remote code execution with high impact on confidentiality, integrity, and availability of affected systems. The attacker does not require privileges or user interaction, increasing the risk of exploitation. However, no known exploits are currently reported in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Microsoft Malware Protection Engine version 1.1.0.0 as soon as possible to mitigate 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.
CVSS v3.1
Score 8.1high
Affected software
Microsoft
Microsoft Malware Protection Engine
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-45584) involves a heap-based buffer overflow in Microsoft Malware Protection Engine version 1.1.0.0. Exploitation could allow an attacker to execute arbitrary code remotely without user interaction and without privileges. The vulnerability is classified under CWE-122. Microsoft has published an official fix to remediate this issue.
Potential Impact
Successful exploitation of this vulnerability could lead to remote code execution with high impact on confidentiality, integrity, and availability of affected systems. The attacker does not require privileges or user interaction, increasing the risk of exploitation. However, no known exploits are currently reported in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided by Microsoft for Microsoft Malware Protection Engine version 1.1.0.0 as soon as possible to mitigate 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: 05/20/2026, 13:19:24 UTC
Last enriched: 08/11/2026, 16:58:53 UTC
Last updated: 09/14/2026, 10:01:31 UTC
Views: 138
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