CVE-2025-66016 CRITICAL

CVE-2025-66016: CGGMP24 is missing a check in the ZK proof used in CGGMP21

Vendor Lfdt-Lockness
Product cggmp21
Weakness CWE-345
Published November 25, 2025
Last update November 25, 2025
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

CGGMP24 is a state-of-art ECDSA TSS protocol that supports 1-round signing (requires 3 preprocessing rounds), identifiable abort, and a key refresh protocol. Prior to version 0.6.3, there is a missing check in the ZK proof that enables an attack in which single malicious signer can reconstruct full private key. This issue has been patched in version 0.6.3, for full mitigation it is recommended to upgrade to cggmp24 version 0.7.0-alpha.2 as it contains more security checks.

Key dates

02Disclosure timeline

November 25, 2025 CVE published
November 25, 2025 Record updated