Zero-day vulnerability in Apex One

Arbitrary file upload
CVE-2021-36741

Vulnerability details

Advisory: SB2021072811 - Multiple vulnerabilities in Trend Micro Apex One

Vulnerable component: Apex One

CVE-ID: CVE-2021-36741

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

Description:

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload within the productтАЩs management console . A remote user can upload a malicious file and execute it on the server.

Note, the vulnerability is being actively exploited in the wild.

External links:

https://success.trendmicro.com/solution/000287819

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.