// For flags

CVE-2025-2516

Use of a weak cryptographic key in the signature verification process in WPS Office

Severity Score

9.5
*CVSS v4

Exploit Likelihood

< 1%
*EPSS

Affected Versions

1
*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

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.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Attack Requirements
None
Privileges Required
None
User Interaction
None
System
Vulnerable | Subsequent
Confidentiality
High
High
Integrity
High
High
Availability
High
High
Attack Vector
Network
Attack Complexity
High
Attack Requirements
None
Privileges Required
None
User Interaction
None
System
Vulnerable | Subsequent
Confidentiality
High
High
Integrity
High
High
Availability
High
High
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
Poc
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2025-03-19 CVE Reserved
  • 2025-03-27 CVE Published
  • 2025-03-27 CVE Updated
  • 2025-04-02 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-326: Inadequate Encryption Strength
CAPEC
  • CAPEC-20: Encryption Brute Forcing
  • CAPEC-187: Malicious Automated Software Update via Redirection
  • CAPEC-485: Signature Spoofing by Key Recreation
Affected Vendors, Products, and Versions (1)