CVE-2026-45584

Microsoft Defender Remote Code Execution Vulnerability

CVSS 8.1 HIGHEPSS 0.9%CWE-122

Vexday Risk Score

41Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 8.1EPSS 0.9%KEV nãoPoC públicaNuclei —Metasploit —Patch referenciado

Lifecycle

20 May 2026Published on NVD

22 May 2026Public PoC

Recommendation: Plan a near-term fix — a public PoC already exists.

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

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Affected products

public PoCs found — 1

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References