CVE-2026-45584

high Microsoft
CVSS v3 Base Score
8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.9%
Exploitation probability in 30 days
Top 46% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: May 20, 2026 (109 days ago)
Last Modified: July 23, 2026
Vendor: Microsoft
Source: NVD

Description

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

CWE

CWE-122

Affected Products

microsoft malware protection engine

References

🔗 msrc.microsoft.com