Heap-based Buffer Overflow in Microsoft Office Outlook by Microsoft
CVE-2026-119996

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-2026-119996?

A heap-based buffer overflow vulnerability in Microsoft Office Outlook can be exploited by an unauthorized attacker to execute arbitrary code over a network. This weakness could potentially allow attackers to gain control of affected systems, leading to unauthorized actions and compromise of sensitive information. Users are encouraged to apply the necessary patches to mitigate this risk and ensure their systems are secure.

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

.