CVE•Published 2026-06-09•Modified 2026-06-09•0 articles on news•6 live references•NVD data
CVE-2026-6899
Vulnerability data via NVD (ingested)
CVSS v3.1
5.6
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS percentile
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Weaknesses (CWE)
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.
Timeline
Published 2026-06-09
Modified 2026-06-09
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-6899Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-6899Censys host search filtered to this CVE id.
grep.app
CVE-2026-6899Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-6899GitHub code search for direct mentions.
Google dork
"CVE-2026-6899" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (1)
We haven't classified any articles referencing CVE-2026-6899 yet. The external references above still apply.