CVE-2026-70125: Microsoft Office Outlook remote code execution

CVE-2026-70125 · Severity: high · CVSS 8.8 · Published 2026-09-23

Microsoft Outlook, a widely used email and calendar application, contains a vulnerability that allows an attacker to execute arbitrary code on a user's computer. An attacker could exploit this by sending a specially crafted message or file, leading to complete system compromise if the user opens or interacts with it.

Technologies: Microsoft Outlook. Vendors: Microsoft.

Quick answers

Is CVE-2026-70125 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-70125 being exploited in the wild.
How severe is CVE-2026-70125?
High severity, with a CVSS score of 8.8, published 23 September 2026.
Which products and versions are affected?
Microsoft Outlook.
Is there a fix for CVE-2026-70125?
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-2026-70125 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-70125?
Check whether you run Microsoft 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 remote code execution flaw exists in Microsoft Outlook allowing an attacker to execute arbitrary code through a network-based attack vector. The vulnerability likely requires user interaction such as opening a malicious attachment or message, but once triggered grants the attacker code execution privileges on the affected system.

Affected products

  • Microsoft Outlook

Timeline

  • 2026-09-23: disclosed

References

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