Unauthenticated SNMP grants full administrative control on widely deployed HMS industrial gateways/ICS devices, risking operational disruption and safety incidents; high CVSS 9.3.
CVE-2026-33367
Unauthenticated SNMP allows full admin control of affected industrial devices.
Is CVE-2026-33367 being exploited?
Not confirmed. CVE-2026-33367 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 0.29% probability of exploitation in the next 30 days.
How severe is CVE-2026-33367?
CVE-2026-33367 is rated Critical with a CVSS score of 9.3. 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-2026-33367?
Not known from our data. No patch reference has been recorded for CVE-2026-33367, 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-2026-33367 affect?
CVE-2026-33367 affects HMS Networks industrial gateways/devices (per CISA advisory), Remote access/ICS gateways using SNMP. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-33367?
Disable SNMP, isolate devices, apply vendor mitigations, monitor and patch when available.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attackers can retrieve configs, modify users/settings, and install firmware to gain persistent full control and disrupt OT operations.
Immediate action required
- affected< Firmware Versions 3.11.0
- affected< Bootloader Versions 2.0.6.1
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.