CVE-2026-119996: Microsoft Office Outlook heap buffer overflow

CVE-2026-119996 · Severity: high · CVSS 7.5 · Published 2026-11-10

Microsoft Outlook is an email and calendar application widely used in corporate environments. A heap buffer overflow vulnerability in Outlook allows attackers to execute arbitrary code on a user's computer over a network, potentially leading to data theft, malware installation, or account compromise without requiring user interaction or credentials.

Technologies: Microsoft Office Outlook. Vendors: Microsoft.

Quick answers

Is CVE-2026-119996 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-119996 being exploited in the wild.
How severe is CVE-2026-119996?
High severity, with a CVSS score of 7.5, published 10 November 2026.
Which products and versions are affected?
Microsoft Office Outlook.
Is there a fix for CVE-2026-119996?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-119996 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-119996?
Check whether you run Microsoft Office Outlook. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A heap-based buffer overflow exists in Microsoft Outlook that can be triggered remotely without authentication. The vulnerability allows an attacker to execute arbitrary code in the context of the affected application via a network vector, potentially achieving remote code execution on a target system.

Affected products

  • Microsoft Office Outlook

Timeline

  • 2026-11-10: disclosed

References

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