# CVE-2026-26110: Microsoft Office type confusion local code execution

Source: https://junglewise.ai/threats/cve-2026-26110-microsoft-office-type-confusion-local-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-10. Updated: 2026-05-22  
License: CC BY 4.0 with a link back

CVE-2026-26110 · Severity: high · CVSS 8.4 · Published 2026-03-10

A vulnerability in Microsoft Office could allow an attacker to run unauthorized code on a target computer. Microsoft Office is a widely used suite of productivity applications including Word, Excel, and PowerPoint. If exploited, this flaw could allow an attacker to gain full control over the affected system, potentially leading to the theft of sensitive data or the installation of malware.

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 for Android](https://junglewise.ai/threats/technologies/office-for-android), [Microsoft Office LTSC 2021](https://junglewise.ai/threats/technologies/office-ltsc-2021), [Microsoft Office LTSC 2024](https://junglewise.ai/threats/technologies/office-ltsc-2024). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-26110 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-26110 being exploited in the wild.

**How severe is CVE-2026-26110?** High severity, with a CVSS score of 8.4, published 10 March 2026.

**Which products and versions are affected?** Microsoft Office for Android before 16.0.19822.20000.

**Is there a fix for CVE-2026-26110?** 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-2026-26110 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-26110?** 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 type confusion vulnerability (CWE-843) exists in Microsoft Office across multiple platforms, including Windows, macOS, and Android. The flaw occurs when the application accesses a resource using an incompatible type, which can be leveraged by a local attacker to execute arbitrary code. While the attack vector is local, the Microsoft-provided CVSS score indicates that no special privileges or user interaction are required for successful exploitation. Affected versions include Office 2016, 2019, LTSC 2021/2024, and Microsoft 365 Apps. A patch is available via the Microsoft Security Update Guide.

## Affected products

- Microsoft Office 2016
- Microsoft Office 2019
- Microsoft Office LTSC 2021
- Microsoft Office LTSC 2024
- Microsoft 365 Apps for Enterprise
- Microsoft Office for Android before 16.0.19822.20000

## Timeline

- 2026-03-10: disclosed
- 2026-03-10: advisory: Microsoft published the security update guide.

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26110](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26110)

## 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)