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    CVE-2026-45584

    Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.

    Published:May 20, 2026
    Last Modified:May 20, 2026
    EPS:May 20, 2026
    EPSS Score:
    CVSS Score:8.1

    Affected Products

    Vendor
    Microsoft
    Product
    Malware Protection Engine

    Exploits

    https://github.com/96613686/CVE-2026-45584

    Common Weakness Enumeration

    CWE-122 Heap-based Buffer Overflow

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2026-69414 (CVSS 7.8) — Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defend…
    CVE-2026-55012 (CVSS 7.8) — Integer overflow or wraparound in Microsoft Defender allows an unauthorized attacker to execute code locally.…
    CVE-2026-55011 (CVSS 7.8) — Integer underflow (wrap or wraparound) in Microsoft Defender allows an unauthorized attacker to execute code l…
    CVE-2026-50656 (CVSS 7.8) — Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defend…
    CVE-2026-41091 (CVSS 7.8) — Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized atta…
    CVE-2023-33156 (CVSS 6.3) — Microsoft Defender Elevation of Privilege Vulnerability…
    CVE-2023-24860 (CVSS 7.5) — Microsoft Defender Denial of Service Vulnerability…
    CVE-2023-23389 (CVSS 6.3) — Microsoft Defender Elevation of Privilege Vulnerability…
    CVE-2022-37971 (CVSS 7.1) — Microsoft Windows Defender Elevation of Privilege Vulnerability…
    CVE-2022-24548 (CVSS 5.5) — Microsoft Defender Denial of Service Vulnerability…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High