RCE in Honeywell Control Network Module

CVE-2026-5433

Honeywell Control Network Module (CNM) contains command injection vulnerability in the web interface. An attacker could exploit this vulnerability via command delimiters, potentially resulting in Remote Code Execution (RCE).  Honeywell recommends updating to the most recent version of this product, service or offering [200.1]. The CNM versions affected are from [100.1, 101.1, 110.1, and 110.2].

Vulnerability class: Command Injection (OS Command Injection)

Published · last modified .

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.016 (74.1th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-5433: rose from 0.010 to 0.016.

EPSS over last 30 days · oldest: 0.010 · newest: 0.016 · change: +0.006

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-5433?
CVE-2026-5433 is a critical-severity vulnerability in Honeywell Control Network Module, classified under Command Injection. CVSS score: 9.1/10. Published 2026-05-21.
How severe is CVE-2026-5433?
Critical severity. CVSS v3 base score is 9.1 out of 10.