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CVE-2026-40363 - Vulnerability Analysis

HighCVSS: 8.4

Last Updated: May 12, 2026

Microsoft Office - Remote Code Execution

Published: May 12, 2026Updated: May 12, 2026

Overview

Microsoft Office contains a heap-based buffer overflow caused by improper memory handling, letting unauthorized attackers execute code locally, exploit requires local access.

Severity & Score

Severity: High

CVSS Score: 8.4

Impact

Unauthorized local attackers can execute arbitrary code, potentially leading to full system compromise.

Mitigation

Update to the latest version of Microsoft Office.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40363

Related Resources

Vulnerability Intelligence Dashboard
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Details

CVE ID: CVE-2026-40363
Severity: High
CVSS Score: 8.4
Type: buffer_overflow
Status: new

CWE

CWE-122

CVSS Metrics

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