CVE-2025-66017 CGGMP21 presignatures can be used in the way that significantly reduces security
Attackers can exploit presignature usage in CGGMP21/24 libraries to significantly reduce cryptographic security, requiring an upgrade to patched versions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-66017?
CVE-2025-66017 is a high-severity vulnerability in LFDT-Lockness cggmp21, published on 25 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-327
Which versions are affected by CVE-2025-66017?
6 open source packages ship an affected version, including cggmp21 and cggmp24.
| Package | Affected | Fixed in |
|---|---|---|
cggmp21 crates.io | All versions to 0.6.3 | None |
cggmp21 crates.io | All versions to 0.6.3 | None |
cggmp21 crates.io | From 0.0.0-0 | None |
cggmp24 crates.io | All versions | 0.7.0-alpha.2 |
cggmp24 crates.io | All versions | 0.7.0-alpha.2 |
cggmp24 crates.io | From 0.0.0-0 | 0.7.0-alpha.2 |
How do I fix CVE-2025-66017?
Upgrade to a fixed version.
Is CVE-2025-66017 being exploited?
There is no known exploitation of CVE-2025-66017 in the wild and no public exploit code.
Sources
Also known as GHSA-8frv-q972-9rq5, RUSTSEC-2025-0127, RUSTSEC-2025-0128.