Out-of-Bounds Read Vulnerability in Microsoft Excel
CVE-2026-50408

5.5MEDIUM

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Microsoft Excel 2016
Microsoft Office 2019
Microsoft Office 365 For Mac
Vendor
CVE Published:
14 July 2026

What is CVE-2026-50408?

An out-of-bounds read vulnerability in Microsoft Excel has been identified, which could allow an unauthorized attacker to access sensitive information locally. If successfully exploited, this flaw may permit attackers to disclose data that should remain confidential, thus posing a significant risk to users. Microsoft has released security updates to mitigate this issue, and it is imperative for users to apply these patches to safeguard their systems.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Excel 2016 32-bit Systems 16.0.0.0 < 16.0.5561.1001

Microsoft Office 2019 32-bit Systems 19.0.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.