Description

The use of a weak cryptographic key pair in the signature verification process in WPS Office (Kingsoft) on Windows allows an attacker who successfully recovered the private key to sign components. As older versions of WPS Office did not validate the update server's certificate, an Adversary-In-The-Middle attack was possible allowing updates to be hijacked.

Classification

CVE ID: CVE-2025-2516

CVSS Base Severity: CRITICAL

CVSS Base Score: 9.5

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/U:Amber

Affected Products

Vendor: Kingsoft

Product: WPS Office

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.01% (probability of being exploited)

EPSS Percentile: 1.06% (scored less or equal to compared to others)

EPSS Date: 2025-04-06 (when was this score calculated)

Timeline