# CVE-2026-50467: Microsoft Office use after free local code execution

Source: https://junglewise.ai/threats/cve-2026-50467-microsoft-office-use-after-free-local-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-14. Updated: 2026-07-14  
License: CC BY 4.0 with a link back

CVE-2026-50467 · Severity: high · CVSS 7.8 · Published 2026-07-14

A security vulnerability has been identified in Microsoft Office, the widely used suite of productivity applications. An attacker could exploit this flaw to run unauthorized code on a user's computer if the user is tricked into opening a specially crafted file. This could lead to a full compromise of the user's data, unauthorized access to corporate resources, and disruption of business operations.

Technologies: [Microsoft 365 Apps for Enterprise](https://junglewise.ai/threats/technologies/365-apps-for-enterprise), [Microsoft Office 2016](https://junglewise.ai/threats/technologies/office-2016), [Microsoft Office 2019](https://junglewise.ai/threats/technologies/office-2019), [Microsoft Office 365 for Mac](https://junglewise.ai/threats/technologies/office-365-for-mac), [Microsoft Office LTSC 2021](https://junglewise.ai/threats/technologies/office-ltsc-2021), [Microsoft Office LTSC 2024](https://junglewise.ai/threats/technologies/office-ltsc-2024), [Microsoft Office LTSC for Mac 2021](https://junglewise.ai/threats/technologies/office-ltsc-for-mac-2021), [Microsoft Office LTSC for Mac 2024](https://junglewise.ai/threats/technologies/office-ltsc-for-mac-2024). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-50467 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-50467 being exploited in the wild.

**How severe is CVE-2026-50467?** High severity, with a CVSS score of 7.8, published 14 July 2026.

**Which products and versions are affected?** Microsoft 365 Apps for Enterprise 16.0.1 to latest security release; Microsoft Office 2016 16.0.0 to 16.0.5561.1000; Microsoft Office 2019 19.0.0 to latest security release; Microsoft Office 365 for Mac 1.0.0 to 16.111.26071215; and 4 more.

**Is there a fix for CVE-2026-50467?** 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-2026-50467 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-50467?** Check whether you run Microsoft 365 Apps for Enterprise, Microsoft Office 2016, Microsoft Office 2019 or one of the others listed at an affected version. 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 Use-After-Free (UAF) vulnerability exists in Microsoft Office across multiple versions, including Office 2016, 2019, LTSC, and Microsoft 365 Apps. The flaw is triggered when the application attempts to use memory that has already been freed, which can be leveraged by an attacker to achieve arbitrary code execution. The attack vector is local, requiring a user to interact with a malicious file (User Interaction: Required). Successful exploitation allows the attacker to execute code with the privileges of the logged-in user. Microsoft has released security updates to address this issue.

## Affected products

- Microsoft Microsoft 365 Apps for Enterprise 16.0.1 to latest security release
- Microsoft Microsoft Office 2016 16.0.0 to 16.0.5561.1000
- Microsoft Microsoft Office 2019 19.0.0 to latest security release
- Microsoft Microsoft Office 365 for Mac 1.0.0 to 16.111.26071215
- Microsoft Microsoft Office LTSC 2021 16.0.1 to latest security release
- Microsoft Microsoft Office LTSC 2024 16.0.0 to latest security release
- Microsoft Microsoft Office LTSC for Mac 2021 16.0.1 to 16.111.26071215
- Microsoft Microsoft Office LTSC for Mac 2024 16.0.0 to 16.111.26071215

## Timeline

- 2026-07-14: disclosed
- 2026-07-14: advisory

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50467](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50467)

## Related threats

- [Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.](https://junglewise.ai/threats/cve-2026-70310-out-of-bounds-read-in-microsoft-office-word-allows-an)
- [Microsoft Office out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-56195-microsoft-office-out-of-bounds-read-information-disclosure)
- [Microsoft Office Out-of-bounds Read Information Disclosure](https://junglewise.ai/threats/cve-2026-56192-microsoft-office-out-of-bounds-read-information-disclosure)
- [Microsoft Office Excel heap buffer overflow](https://junglewise.ai/threats/cve-2026-56156-microsoft-office-excel-heap-buffer-overflow)
- [Microsoft Excel use of uninitialized resource code execution](https://junglewise.ai/threats/cve-2026-55949-microsoft-excel-use-of-uninitialized-resource-code-execution)