CVE-2025-66017
High
Description
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. In versions 0.6.3 and prior of cggmp21 and version 0.7.0-alpha.1 of cggmp24, presignatures can be used in the way that significantly reduces security. cggmp24 version 0.7.0-alpha.2 release contains API changes that make it impossible to use presignatures in contexts in which it reduces security.
SeverityHigh
CVSS8.2
Exploit probability—
ProductLfdt-lockness Cggmp21
PublishedNov 25, 2025
First seenNov 25, 2025
Weakness typeCWE-327CWE-327
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| LFDT-Lockness cggmp21 | cggmp21 <= 0.6.3, cggmp24 = 0.7.0-alpha.1 | — |
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