Vulnerability · Published May 21, 2026 · Assigned by Honeywell

CVE-2026-5434Improper storage of sensitive information

Medium 5.9

In plain English

A medium-severity security flaw in Control Network Module (CNM) from Honeywell International Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).

Severity (CVSS 3.1)5.9Medium

Exploit odds (30 days)0.2%top 89.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Honeywell Control Network Module (CNM) contains insertion of sensitive information into an unintended directory. An attacker could exploit this vulnerability through probing system files, potentially resulting in unintended access to protected data. 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].

Affected products (as reported)

Vendor	Product	Versions
Honeywell International Inc.	Control Network Module (CNM)	100.1 – through 110.2

Weakness: CWE-538 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://www.honeywell.com/us/en/product-security