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Findings

CVE-2026-45584

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

Published May 20, 2026 · updated Jul 23, 2026 · microsoft malware protection engine

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

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 20, 2026 · NIST NVD

    Detected

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

  2. Jul 23, 2026 · NIST NVD

    Updated

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

Affected

  • cpe microsoft/malware protection engineversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-45584

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-45584

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

    nvd.nist.gov

References