LFDT-Lockness cggmp21 up to 0.6.2 ECDSA TSS Protocol data authenticity

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in LFDT-Lockness cggmp21 up to 0.6.2. This vulnerability affects unknown code of the component ECDSA TSS Protocol. The manipulation leads to data authenticity. This vulnerability is referenced as CVE-2025-66016. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in LFDT-Lockness cggmp21 up to 0.6.2 and classified as critical. This issue affects some unknown functionality of the component ECDSA TSS Protocol. The manipulation with an unknown input leads to a data authenticity vulnerability. Using CWE to declare the problem leads to CWE-345. The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-66016 since 11/21/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version 0.6.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-199643). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Data authenticity
CWE: CWE-345
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: cggmp21 0.6.3

Timelineinfo

11/21/2025 CVE reserved
11/26/2025 +5 days Advisory disclosed
11/26/2025 +0 days VulDB entry created
11/27/2025 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-m95p-425x-x889
Status: Confirmed

CVE: CVE-2025-66016 (🔒)
GCVE (CVE): GCVE-0-2025-66016
GCVE (VulDB): GCVE-100-333545
EUVD: 🔒

Entryinfo

Created: 11/26/2025 06:31
Updated: 11/27/2025 23:22
Changes: 11/26/2025 06:31 (67), 11/27/2025 23:22 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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