CVE-2026-55012

⚠️ high

🔍 Scan for this CVE

Integer overflow or wraparound in Microsoft Defender allows an unauthorized attacker to execute code locally.

CVSS Score

7.8

High

EPSS Score

0.4

Exploit Probability

Published Date

2026-07-14

First Seen: 2026-07-15

This CVE is Moderate Risk - more severe than 69.4% of all 338,295 vulnerabilities in our database.

#103,392

Above average severity

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 2026-07-24

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-122 CWE-190

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
microsoft	malware_protection_engine	Affected	< 1.1.26060.3008

Vendor Advisory

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-55011	⚠️ high	7.8	0.4	Integer underflow (wrap or wraparound) in Microsoft Defender allows an unauthorized attacker to execute code locally.	2026-07-14
CVE-2026-50656	⚠️ high	7.8	3.4	Microsoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicl...	2026-06-16
CVE-2026-41091	⚠️ high	7.8	9.6	Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to el...	2026-05-20
CVE-2026-45584	⚠️ high	8.1	0.9	Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.	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

These CVEs affect the same products