Out-of-Bounds Read Vulnerability in Microsoft Office Excel
CVE-2026-118725

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Microsoft Office 365 For Mac
Microsoft Office Ltsc 2021
Microsoft Office Ltsc 2024
Vendor
CVE Published:
10 November 2026

What is CVE-2026-118725?

An out-of-bounds read vulnerability in Microsoft Office Excel could enable an unauthorized attacker to exploit the system, potentially leading to privilege escalation over a network. This kind of exploit can allow attackers to access sensitive information or execute arbitrary code, posing a significant risk to system integrity and data confidentiality. Users are advised to apply necessary patches and updates provided by Microsoft to safeguard against this vulnerability.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Office 365 for Mac 1.0.0 < 16.115.26110837

Microsoft Office LTSC 2021 32-bit Systems 16.0.1 < 16.0.14334.21048

References

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

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.