Description
Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Microsoft Malware Protection Engine | 1.1.0.0 – < 1.1.26040.8 | 1.1.26040.8 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
96613686/CVE-2026-45584 ★ 0 · May 22, 2026
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 2
- WID-SEC-2026-1603 Microsoft Defender und Malware Protection Engine: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 28, 2026
- MSRC-CVE-2026-45584 Microsoft Defender Remote Code Execution Vulnerability Microsoft Security Response Center · May 26, 2026
References
- Microsoft Defender Remote Code Execution Vulnerability vendor-advisory patch