CVE-2024-26257: Microsoft Excel 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:H/RL:O/RC:C

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2024-Apr

Released

2024-04-09

Last Updated

2024-04-16

EPSS Score

0.52% (percentile: 66.6%)

FAQ

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do? An attacker must send the user a malicious file and convince them to open it. 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. This means an attacker or victim needs to execute code from the local machine to exploit the vulnerability. Are the updates for the Microsoft Office 2021 for Mac currently available? The security update for Microsoft Office 2021 for Mac is not immediately available. The update will be released as soon as possible, and when it is available, customers will be notified via a revision to this CVE information.

Affected Products (3)

Microsoft Office

• Microsoft 365 Apps for Enterprise for 32-bit Systems
• Microsoft 365 Apps for Enterprise for 64-bit Systems
• Microsoft Office LTSC for Mac 2021

Security Updates (1)

• Release Notes

Acknowledgments

Anonymous

Revision History

• 2024-04-09: Information published.
• 2024-04-16: Microsoft is announcing the availability of the security updates for Microsoft Office for Mac. Customers running affected Mac software should install the update for their product to be protected from this vulnerability. Customers running other Microsoft Office software do not need to take any action. See the Release Notes for more information and download links.