CVE-2026-18257

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 61/100
Published: 2026-07-29 Modified: 2026-10-24 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: Low
A: Low

Description

Improper validity period check for root issuer certificate in CycloneCrypto cryptographic wrapper of S2OPC allows a certificate issued by this root issuer to be considered trusted

Weakness Classification (1)

Bug Bounty Relevance

61 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

5.6 / 10.0 v3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS — Exploitation Probability

0.15%
Raw Score 0.001550
Percentile 4.5%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00155
2026-10-28
0.00155

Intelligence Sources

nvd ref →