CVE-2026-0646
DoS in 1794-AENTR adapter due to CIP memory handling, causing I/O loss.
Is CVE-2026-0646 being exploited?
Not confirmed. CVE-2026-0646 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 0.34% probability of exploitation in the next 30 days.
How severe is CVE-2026-0646?
CVE-2026-0646 is rated High with a CVSS score of 8.7. 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-2026-0646?
Yes. A fix has been recorded for CVE-2026-0646. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-0646 affect?
CVE-2026-0646 affects 1794-AENTR adapter, CIP-based I/O modules. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-0646?
Monitor health; check vendor firmware; isolate if DoS observed
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
DoS via crafted CIP requests; adapter faults and drops I/O connections, requiring manual reset.
Monitor only
- affected2.012
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.