Zero-day vulnerability in WPS Office

Input validation error
CVE-2024-7263

The vulnerability was exploited by a South Korea-aligned cyberespionage group APT-C-60.

Known malware:

SpyGlace

Vulnerability details

Advisory: SB2024082859 - Remote code execution in Kingsoft WPS Office

Vulnerable component: WPS Office

CVE-ID: CVE-2024-7263

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

CWE-ID: CWE-20 - Improper input validation

Description:

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient path validation in promecefpluginhost.exe. A remote attacker can trick the victim into opening a specially crafted spreadsheet document and execute arbitrary code on the system.

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

External links:

https://www.welivesecurity.com/en/eset-research/analysis-of-two-arbitrary-code-execution-vulnerabilities-affecting-wps-office/

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.