CVE-2026-26134: Microsoft Office Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Mar

Released

2026-03-10

EPSS Score

0.06% (percentile: 18.7%)

Description

Integer overflow or wraparound in Microsoft Office allows an authorized attacker to elevate privileges locally.

FAQ

What privileges could be gained by an attacker who successfully exploited the vulnerability? An attacker who successfully exploited this vulnerability could gain administrator privileges. Is the Preview Pane an attack vector for this vulnerability? No, the Preview Pane is not an attack vector.

Affected Products (1)

Microsoft Office

• Microsoft Office for Android

Security Updates (1)

• Release Notes

Acknowledgments

<a href="https://www.zerodayinitiative.com/">Trend Zero Day Initiative</a>, <a href="https://twitter.com/gaborseljan">G&#225;bor Selj&#225;n</a>

Revision History

• 2026-03-10: Information published.