Remote code execution in Microsoft Word



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-34452
CWE-ID CWE-94
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Microsoft Office
Client/Desktop applications / Office applications

Microsoft Word
Client/Desktop applications / Office applications

Vendor Microsoft

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Code Injection

EUVDB-ID: #VU54803

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-2021-34452

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation in the Microsoft Word. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 2019

Microsoft Word: 2016

CPE2.3 External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34452


Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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



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