#VU53879 Code Injection in Microsoft Office and Microsoft Outlook - CVE-2021-31949

Vulnerability identifier: #VU53879

Vulnerability risk: Medium

CVSSv4.0: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-31949

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Office
Client/Desktop applications / Office applications
Microsoft Outlook
Client/Desktop applications / Office applications

Vendor: Microsoft

Description

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

The vulnerability exists due to improper input validation within the Microsoft Outlook. A remote authenticated attacker can trick a victim to open a specially crafted file or visit a malicious website 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 Outlook: 2013 RT Service Pack 1, 2013 Service Pack 1, 2016

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31949

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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