CVE-2026-45584

⚠️ high

🔍 Scan for this CVE

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

CVSS Score

8.1

High

EPSS Score

0.0

Exploit Probability

Published Date

2026-05-20

First Seen: 2026-05-21

This CVE is High Risk - more severe than 77.5% of all 328,009 vulnerabilities in our database.

#73,816

Top 25% most severe

Severity Percentile

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Total

Complete system compromise possible

SSVC data provided by CISA

Last Modified 2026-05-20

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-122

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
microsoft	malware_protection_engine	Affected	> 1.1.26030.3008 < 1.1.26040.8

Vendor Advisory

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-41091	⚠️ high	7.8	5.9	Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to el...	2026-05-20
CVE-2023-33156	🔶 medium	6.3	0.1	Microsoft Defender Elevation of Privilege Vulnerability	2023-07-11
CVE-2023-24860	⚠️ high	7.5	4.1	Microsoft Defender Denial of Service Vulnerability	2023-04-11
CVE-2023-23389	🔶 medium	6.3	0.1	Microsoft Defender Elevation of Privilege Vulnerability	2023-03-14
CVE-2022-37971	⚠️ high	7.1	0.3	Microsoft Windows Defender Elevation of Privilege Vulnerability	2022-10-11
CVE-2022-24548	🔶 medium	5.5	4.3	Microsoft Defender Denial of Service Vulnerability	2022-04-15

These CVEs affect the same products