CVE-2026-123382: Microsoft Office Outlook untrusted pointer dereference

CVE-2026-123382 · Severity: high · CVSS 8.8 · Published 2026-11-10

Microsoft Office Outlook contains a memory safety flaw that allows attackers to execute arbitrary code through the email client over a network. An attacker could exploit this to compromise systems by sending specially crafted content to Outlook users, potentially leading to unauthorized access, data theft, or installation of malware.

Technologies: Microsoft Office Outlook. Vendors: Microsoft.

Quick answers

Is CVE-2026-123382 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-123382 being exploited in the wild.
How severe is CVE-2026-123382?
High severity, with a CVSS score of 8.8, published 10 November 2026.
Which products and versions are affected?
Microsoft Office Outlook.
Is there a fix for CVE-2026-123382?
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-2026-123382 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-123382?
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

The vulnerability is an untrusted pointer dereference in Microsoft Office Outlook that permits network-based code execution without requiring user authentication. The attack vector is network-based, allowing remote exploitation through email or related mechanisms. A patch from Microsoft exists to address this issue.

Affected products

  • Microsoft Office Outlook

Timeline

  • 2026-11-10: disclosed

References

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