CVE-2025-2516

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

Published Mar 27, 2025 CVSS 4.0 · 9.5 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-8443 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.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Use of a weak cryptographic key in the signature verification process in WPS Office
Weaknesses CWE-326
References
Metrics cvssV4_0

{'score': 9.5, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ESET
Published
Updated
Mar 27, 2025, 3:15 PM
Reserved
Mar 19, 2025, 7:49 AM
Status
Deferred
Published
Mar 27, 2025, 3:16 PM
Modified
Jun 17, 2026, 9:07 AM