Vulnerability identifier: #VU62095

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-26901

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Office Web Apps Server
Server applications / Application servers
Microsoft SharePoint Foundation
Server applications / Application servers
Microsoft SharePoint Server Subscription Edition
Server applications / Application servers
Microsoft SharePoint Enterprise Server
Server applications / Application servers
Office Online Server
Server applications / Other server solutions
Microsoft Office LTSC 2021
Other software / Other software solutions
Microsoft Office
Client/Desktop applications / Office applications
Microsoft Excel
Client/Desktop applications / Office applications
Microsoft 365 Apps for Enterprise
Client/Desktop applications / Office applications

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when parsing Excel files. A remote attacker can trick the victim to open a specially crafted Excel file, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Office Web Apps Server: 2013 Service Pack 1

Microsoft SharePoint Foundation: 2013 Service Pack 1

Microsoft SharePoint Server Subscription Edition: All versions

Microsoft SharePoint Enterprise Server: 2016

Office Online Server : All versions

Microsoft Office LTSC 2021: 32 bit editions - 2021 for Mac

Microsoft Office: 2019 - 2019 for Mac, 2016, 2013 RT Service Pack 1 - 2013 Service Pack 1

Microsoft Excel: 2016, 2013 Service Pack 1, 2013 RT Service Pack 1, 2019

Microsoft 365 Apps for Enterprise: 64-bit Systems, 32-bit Systems

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-26901
http://www.zerodayinitiative.com/advisories/ZDI-22-809/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.