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CVE-2026-55011

HIGH

7.8

CVSS 3.1

Metadata

CVE ID: CVE-2026-55011
State: PUBLISHED
Assigner: microsoft
Reserved: 2026-06-16 14:12 UTC
Published: 2026-07-14 17:05 UTC
Last updated: 2026-07-14 19:37 UTC
Primary CWE: CWE-191
CWE-191: Integer Underflow (Wrap or Wraparound)
Vendor / Product: Microsoft / Microsoft Malware Protection Engine
Sources: cve.org · NVD

Severity & Metrics

7.8 HIGH CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Microsoft	Microsoft Malware Protection Engine	—	1.1.0.0 < 1.1.26060.3008

Weakness (CWE)

CWE	Source	Description
CWE-191	cna	CWE-191: Integer Underflow (Wrap or Wraparound)

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.8	HIGH	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

References (1)

Microsoft Defender Remote Code Execution Vulnerability https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55011

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