high severity September 10, 2026 · 1 min read

CISA ICS Advisory: ST Engineering iDirect iQ-Series Terminals (Update A)

Here’s what this advisory affects, and what to do about it.

Successful exploitation of these vulnerabilities could allow an attacker to gain unauthorized access to device information or cause a denial-of-service condition. The following versions of ST Engineering iDirect iQ-Series Terminals (Update A) are affected: Evolution iQ‑Series terminals 3315‑Series terminals 9‑Series terminals

CISA ICS Advisory: ST Engineering iDirect iQ-Series Terminals (Update A)

CISA has published an updated industrial control systems advisory warning of vulnerabilities in ST Engineering iDirect iQ-Series satellite communication terminals.

Unauthorized access and denial-of-service

The advisory states that successful exploitation of the vulnerabilities could allow an attacker to gain unauthorized access to device information or cause a denial-of-service condition. The advisory does not say whether the flaws have been exploited in the wild.

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Affected products

The following ST Engineering iDirect products are affected:

Evolution iQ-Series terminals
3315-Series terminals
9-Series terminals

No specific version numbers are listed in the advisory beyond the product lines themselves.

What to do

Determine whether any Evolution iQ-Series, 3315-Series, or 9-Series terminals are in use in your environment.
Apply the vendor-provided updates or mitigations published for these terminals.
Follow all recommendations listed in the CISA advisory for restricting network exposure of the affected devices.
Monitor ST Engineering iDirect’s official channels for any further updates to this advisory.
Segment or restrict external access to iQ-Series terminals where immediate patching is not feasible.

Operators of satellite-based industrial control systems and critical infrastructure should treat this class of terminal vulnerabilities as a priority for review.

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Sources: CISA ICS Advisory

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high September 10, 2026