# CVE-2026-124228: Microsoft Office Outlook path traversal in pathname handling

Source: https://junglewise.ai/threats/cve-2026-124228-improper-limitation-of-a-pathname-to-a-restricted-directory-path  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-124228 · Severity: high · CVSS 8.8 · Published 2026-11-10

Microsoft Office Outlook is an email and calendar application used in corporate and personal productivity workflows. A path traversal vulnerability allows an authorized attacker to execute arbitrary code remotely by exploiting improper validation of file paths, potentially compromising the integrity and confidentiality of user data and systems.

Technologies: [Microsoft Office Outlook](https://junglewise.ai/threats/technologies/office-outlook). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-124228 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-124228 being exploited in the wild.

**How severe is CVE-2026-124228?** 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-2026-124228?** 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-2026-124228 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-124228?** 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 a path traversal (CWE-22) weakness in pathname validation within Microsoft Office Outlook. It requires an authorized attacker with network access to craft malicious input that bypasses directory restrictions. Successful exploitation allows arbitrary code execution in the context of the Outlook application.

## Affected products

- Microsoft Office Outlook

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-124228](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-124228)

## Related threats

- [Microsoft Office Outlook use of uninitialized resource code execution](https://junglewise.ai/threats/cve-2026-124227-use-of-uninitialized-resource-in-microsoft-office-outlook-allows)
- [Microsoft Office Outlook user warning spoofing vulnerability](https://junglewise.ai/threats/cve-2026-124194-microsoft-office-outlook-missing-user-interaction-for)
- [Microsoft Office Outlook heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-123383-heap-based-buffer-overflow-in-microsoft-office-outlook-allows-an)
- [Microsoft Office Outlook untrusted pointer dereference](https://junglewise.ai/threats/cve-2026-123382-untrusted-pointer-dereference-in-microsoft-office-outlook-allows)
- [Microsoft Office Outlook stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-123381-stack-based-buffer-overflow-in-microsoft-office-outlook-allows)