Vulnerability Report

CVE-2026-45584

RCE

Title: Heap-based Buffer Overflow in Microsoft Defender

RCE

Proof Of Concept

PoC Available for CVE-2026-45584

CWE Category CWE-122

Published Date May 20, 2026

Modified Date May 20, 2026

Exploit Status Available

Score 8.1 CVSS v3.1

Exploit Probability (EPSS)

0.85%

Vulnerability Summary

CVE-2026-45584: Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.

Impacted Vendors

microsoft 1

Reference Links

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45584

CVSS v3.1

Source Entity [email protected]

Severity HIGH

8.1

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-45584 Exploits & PoCs (Proof Of Concept)

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

View Code

May 20, 2026 MODIFIED

Vulnerability data updated via NVD.

May 20, 2026 MODIFIED

Vulnerability data updated via NVD.

May 20, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity HIGH

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.