CVE-2025-8556

LOW EPSS 36.1%
Published Aug 6, 202510mo ago · Modified Jun 17, 20261w ago
3.7 CVSS 3.1
Low
Find Similar
Published Aug 6, 2025 10mo ago
Last Modified Jun 17, 2026 1w ago

Description

A flaw was found in CIRCL's implementation of the FourQ elliptic curve. This vulnerability allows an attacker to compromise session security via low-order point injection and incorrect point validation during Diffie-Hellman key exchange.

CVSS Details

Base Score
3.7
Exploitability
2.2
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
36.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-1287

References 7

  • access.redhat.com https://access.redhat.com/security/cve/CVE-2025-8556
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2371624
  • github.com https://github.com/cloudflare/circl
  • github.com https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm
  • github.com https://github.com/cloudflare/circl/tree/v1.6.1
  • news.ycombinator.com https://news.ycombinator.com/item?id=45669593
  • botanica.software https://www.botanica.software/blog/cryptographic-issues-in-cloudflares-circl-fourq-implementation

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.