#VU77260 Input validation error in Microsoft products - CVE-2023-33133

Vulnerability identifier: #VU77260

Vulnerability risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-33133

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Office
Client/Desktop applications / Office applications
Microsoft Excel
Client/Desktop applications / Office applications
Microsoft 365 Apps for Enterprise
Client/Desktop applications / Office applications
Office Online Server
Server applications / Other server solutions
Microsoft Office LTSC 2021
Other software / Other software solutions

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to insufficient validation of user-supplied input in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 2019 for Mac - 2019

Office Online Server : All versions

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

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

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

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-33133

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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.