Affects Apache PLC4X OPC UA driver used in industrial connectivity; enables MitM of control traffic and credential theft — high-impact for OT environments and enterprise ICS deployments.
CVE-2026-102508
OPC UA driver in Apache PLC4X allows MitM to read/modify secure-channel traffic and credentials
Is CVE-2026-102508 being exploited?
Not confirmed. CVE-2026-102508 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.
How severe is CVE-2026-102508?
CVE-2026-102508 is rated Critical with a CVSS score of 9.2. 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-2026-102508?
Yes. A fix has been recorded for CVE-2026-102508. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-102508 affect?
CVE-2026-102508 affects Apache PLC4X OPC UA driver versions 0.9.0 to before 1.0.0 (0.9.0-0.13.1), Any application or ICS/SCADA component using PLC4X for OPC UA communications. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-102508?
Upgrade to Apache PLC4X 1.0.0 and verify truststore/security policy settings
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Network MitM can impersonate OPC UA server to read, forge, or modify secure-channel traffic including user credentials; may enable command manipulation of OT systems.
Immediate action required
- affected>= 0.9.0 and < 1.0.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.