What is CVE-2022-30317?

CVE-2022-30317 is a critical-severity vulnerability in Honeywell Experion Lx, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2022-08-31.

How severe is CVE-2022-30317?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Honeywell Experion Lx

CVE-2022-30317

Honeywell Experion LX through 2022-05-06 has Missing Authentication for a Critical Function. According to FSCT-2022-0055, there is a Honeywell Experion LX Control Data Access (CDA) EpicMo protocol with unauthenticated functionality issue. The affected components are characterized as: Honeywell Control Data Access (CDA) EpicMo (55565/TCP). The potential impact is: Firmware manipulation, Denial of service. The Honeywell Experion LX Distributed Control System (DCS) utilizes the Control Data Access (CDA) EpicMo protocol (55565/TCP) for device diagnostics and maintenance purposes. This protocol does not have any authentication features, allowing any attacker capable of communicating with the ports in question to invoke (a subset of) desired functionality. There is no authentication functionality on the protocol in question. An attacker capable of invoking the protocols' functionalities could issue firmware download commands potentially allowing for firmware manipulation and reboot devices causing denial of service.

Vulnerability class: Broken Authentication

Published 2022-08-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (57.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.009 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.forescout.com/blog/ (Not Applicable)
www.cisa.gov/uscert/ics/advisories/icsa-22-242-07 (US Government Resource, Third Party Advisory, Mitigation)

Frequently asked questions

What is CVE-2022-30317?: CVE-2022-30317 is a critical-severity vulnerability in Honeywell Experion Lx, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2022-08-31.
How severe is CVE-2022-30317?: Critical severity. CVSS v3 base score is 9.1 out of 10.