CVE-2026-18257

mediumpriority · track · 0EPSS 0.002 · 5 %ileEU
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.15% (5th) EPSS
CVSS 5.6 · medium
Is it mine?
1 products
Check your exposure
Who says so?
2 sources
cnnvd · enisa_euvd

EPSS · scored 2026-10-28

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

01

cvss

Technical severity, 0–10. One row per scoring source.

5.6
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.6mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · ENISA EU
v3.15.6mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · cve@gitlab.comexploitability 2.2 · impact 3.4
v3.15.1mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:Usecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-295US
04

affected products (1)

Products and version ranges known to be affected.

05

also known as (3)

Other names and identifiers for this entity.

06

sources

Which sources assert this record, and when.

cnnvdenisa_euvdNVDCVE.orgMITRE
published 2026-07-29modified 2026-10-24
07

references (3)

External citations — patches, advisories, analysis.

scry

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