CVE-2026-6899

June 9, 2026, 3:25 p.m.

5.6
Medium

Description

Check for certificate revocation only considers the first matching CRL and ignores other valid CRLs of the same CA in the CycloneCrypto cryptographic wrapper of S2OPC library. It might allow connection between an OPC UA client and server using a revoked certificate.

Product(s) Impacted

Vendor Product Versions
S2opc
  • Cyclonecrypto
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-299
Improper Check for Certificate Revocation
The product does not check or incorrectly checks the revocation status of a certificate, which may cause it to use a certificate that has been compromised.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a s2opc cyclonecrypto / / / / / / / /

References

https://gitlab.com/systerel/S2OPC/-/work_items/1739

Tags

[email protected]
CWE-299
2026-06-09
CVE-2026-6899

CVSS Score

5.6 / 10

CVSS Data - 3.1

  • Attack Vector: NETWORK
  • Attack Complexity: HIGH
  • Privileges Required: NONE
  • Scope: UNCHANGED
  • Confidentiality Impact: LOW
  • Integrity Impact: LOW
  • Availability Impact: LOW

    • CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

    View Vector String

Timeline

Published: June 9, 2026, 9:16 a.m.
Last Modified: June 9, 2026, 3:25 p.m.

Status : Deferred

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.