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

Source: https://junglewise.ai/threats/cve-2026-70125-microsoft-office-outlook-remote-code-execution-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-23. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/outlook). Vendors: [Microsoft](https://junglewise.ai/threats/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

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70125](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70125)

## Related threats

- [Microsoft Office Outlook user warning spoofing vulnerability](https://junglewise.ai/threats/cve-2026-124194-microsoft-office-outlook-missing-user-interaction-for)
- [Microsoft Outlook heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-123384-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an)
- [Microsoft Outlook heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-123380-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an)
- [Microsoft Office Outlook heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-123377-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an)
- [Microsoft Outlook out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-80084-microsoft-outlook-out-of-bounds-read-information-disclosure)