CVE-2026-67868
Remote RCE in S2OPC 1.7.3 via EventFilter during CreateMonitoredItems
Is CVE-2026-67868 being exploited?
Not confirmed. CVE-2026-67868 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.76% probability of exploitation in the next 30 days.
How severe is CVE-2026-67868?
CVE-2026-67868 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-67868?
Not known from our data. No patch reference has been recorded for CVE-2026-67868, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-67868 affect?
CVE-2026-67868 affects S2OPC 1.7.3, OPC UA servers using S2OPC, Industrial/IoT devices embedding S2OPC. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-67868?
Isolate affected servers, restrict network access, apply vendor patch or mitigation when available
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Heap out-of-bounds write in server EventFilter handling allows remote attackers to achieve arbitrary code execution on affected OPC UA servers.
Immediate action required