Heap-Based Buffer Overflow in Microsoft Office Outlook
CVE-2026-119995

7.5HIGH

Key Information:

Vendor

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

What is CVE-2026-119995?

A heap-based buffer overflow exists in Microsoft Office Outlook, permitting unauthorized attackers to exploit this vulnerability and execute arbitrary code over a network. Successful exploitation could lead to unauthorized access to sensitive data and control over affected systems. Microsoft has released security updates to mitigate this vulnerability, and users are advised to apply these patches promptly to safeguard their information.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Office LTSC 2021 32-bit Systems 16.0.1 < 16.0.14334.21048

Microsoft Office LTSC 2024 32-bit Systems 16.0.0 < 16.0.17932.21140

References

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

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.