CVE-2025-8556

LOW
INFO Priority: 0.02 BB Relevance: 58/100
Published: 2025-08-06 Modified: 2026-10-27 First seen: 2026-10-29 Status: active

Attack Surface

Network No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: None
S: Unchanged
C: Low
I: None
A: None

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.

Weakness Classification (1)

Bug Bounty Relevance

58 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

3.7 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS — Exploitation Probability

0.53%
Raw Score 0.005310
Percentile 44.8%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00531
2026-10-28
0.00531

Intelligence Sources

mitre ref →
nvd ref →