CVE-2025-26629: Microsoft Office Remote Code Execution Vulnerability
Overview
- Severity
- High (CVSS 7.8)
- CVSS Vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
- Category
- Remote Code Execution
- Exploit Status
- Not Exploited
- Exploitation Likelihood
- Less Likely
- Patch Tuesday
- 2025-Mar
- Released
- 2025-03-11
- Last Updated
- 2025-05-13
- EPSS Score
- 0.46% (percentile: 64.2%)
Description
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
FAQ
According to the CVSS metric, the attack vector is local (AV:L). Why does the CVE title indicate that this is a remote code execution?
The word Remote in the title refers to the location of the attacker. This type of exploit is sometimes referred to as Arbitrary Code Execution (ACE). The attack itself is carried out locally.
For example, when the score indicates that the Attack Vector is Local and User Interaction is Required, this could describe an exploit in which an attacker, through social engineering, convinces a victim to download and open a specially crafted file from a website which leads to a local attack on their computer.
Is the Preview Pane an attack vector for this vulnerability?
No, the Preview Pane is not an attack vector.
Affected Products (4)
Microsoft Office
- Microsoft 365 Apps for Enterprise for 32-bit Systems
- Microsoft 365 Apps for Enterprise for 64-bit Systems
- Microsoft Office LTSC 2024 for 32-bit editions
- Microsoft Office LTSC 2024 for 64-bit editions
Acknowledgments
Haifei Li with <a href="https://pub.expmon.com/">EXPMON</a>
Revision History
- 2025-03-11: Information published.
- 2025-05-13: To comprehensively address CVE-2025-26629, Microsoft has released May 2025 security updates for all affected versions of Microsoft Office. Customers running any of these versions should ensure that they have the latest build installed. For more information and to verify the build version, see https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates.