CVE-2022-30792 CODESYS CVE debrief

Who should care

Operators and maintainers of Festo Automation Suite deployments that include CODESYS components, especially where automation engineering workstations or OT hosts accept network-based CODESYS communication. Security teams responsible for industrial control system patching and exposure reduction should prioritize affected installations.

Technical summary

The advisory describes uncontrolled resource consumption in CmpChannelServer of CODESYS V3. Because the issue is reachable without authentication, an attacker can exhaust the server’s ability to accept new communication channel connections. The result is a denial of service for new sessions rather than a full outage of existing connections. The source advisory ties affected product entries to Festo Automation Suite versions below 2.8.0.138 and bundled CODESYS Development System components, and recommends moving to patched CODESYS releases and current Festo Automation Suite updates.

Defensive priority

High. This is a network-reachable, unauthenticated availability impact in an industrial software component. Prioritize patching and exposure reduction on any system that creates or brokers CODESYS communication channels, especially production OT hosts.

Recommended defensive actions

• Update affected installations to the latest patched CODESYS release from the official CODESYS website.
• Apply Festo Automation Suite updates as released by Festo and follow the vendor installation and update instructions.
• For deployments that no longer need bundled CODESYS, verify the suite version and separate CODESYS installation path introduced in Festo Automation Suite 2.8.0.138.
• Monitor CODESYS and Festo security advisories regularly and apply updates promptly.
• Review OT network exposure and limit access to the affected service to trusted management networks only, following established ICS defense-in-depth practices.

Evidence notes

Source corpus indicates the advisory was published on 2026-02-26 and modified on 2026-03-17; those dates should be treated as the advisory timeline for this record. The advisory text states that uncontrolled resource consumption in CmpChannelServer of CODESYS V3 can block new communication channel connections while leaving existing connections unaffected. The remediation section specifically says that starting with Festo Automation Suite 2.8.0.138, CODESYS is no longer bundled and must be installed separately, and advises customers to obtain patched CODESYS directly from the official website. The source metadata also contains inconsistent vendor labeling, so vendor attribution should be treated as low confidence and reviewed.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.