CVE-2025-66017 json
CGGMP21 presignatures can be used in the way that significantly reduces security
published 2025-11-24 11 mo ago modified 2026-10-18 21 d ago also GHSA-8frv-q972-9rq5 , RUSTSEC-2025-0127 , RUSTSEC-2025-0128 , EUVD-2025-199640
- cvss
- 8.2
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 13%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 11 mo ago
Exploit prediction
0.22% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.2 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 8.2 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| crates.io | cggmp21 | <=0.6.3 >=0.0.0-0 |
no fix listed |
| crates.io | cggmp24 | <0.7.0-alpha.2 >=0.0.0-0, <0.7.0-alpha.2 |
0.7.0-alpha.2 |
Affected products
- LFDT-Lockness cggmp21
Classification
- Weakness
-
- CWE-327 Use of a Broken or Risky Cryptographic Algorithm
References
-
github.com
/LFDT-Lockness/cggmp21/commit/9d98157e151596573cb071da59d27a4e0ac9b8dc
web
-
github.com
/LFDT-Lockness/cggmp21/security/advisories/GHSA-8frv-q972-9rq5
web
-
dfns.co
/article/cggmp21-vulnerabilities-patched-and-explained
web
-
nvd.nist.gov
/vuln/detail/CVE-2025-66017
advisory
-
github.com
/LFDT-Lockness/cggmp21
package
-
rustsec.org
/advisories/RUSTSEC-2025-0127.html
web, advisory
-
rustsec.org
/advisories/RUSTSEC-2025-0128.html
web, advisory
-
crates.io
/crates/cggmp24
package
-
crates.io
/crates/cggmp21
package
Sources
- CVE List CVE-2025-66017
- GitHub Advisory GHSA-8frv-q972-9rq5
- NVD CVE-2025-66017
- OSV RUSTSEC-2025-0128
- OSV RUSTSEC-2025-0127
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