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20 May 2026

Vulnerabilities first published on this day (UTC), newest first.

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All Critical High Medium Low Exploited only Public exploit

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  • High 8.1
    CVE-2026-45584 Public exploit

    Microsoft Defender Remote Code Execution Vulnerability

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

    Microsoft Microsoft Malware Protection Engine
  • High 7.8
    CVE-2026-41091 Exploited Public exploit

    Microsoft Defender Elevation of Privilege Vulnerability

    Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to elevate privileges locally.

    Microsoft Microsoft Malware Protection Engine
    KEV May 20, 2026
  • High 7.5
    CVE-2026-39047 Public exploit

    Buffer Overflow vulnerability in EPSON L14150 FL27PB allows a remote attacker to execute arbitrary code via the RAW Pri…