Controller denial of service due to improper handling of a specially crafted message received by the controller.

published 2024-04-17 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-57722

cvss: 5.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits: 0; none known

See Honeywell Security Notification for recommendations on upgrading and versioning.

Patch / fix

fixed in 1

Honeywell C300 510.2 HF14, 511.5 TCU4 HF4, 520.1 TCU5, 520.2 TCU4 HF1, 520.2 TCU4 HF2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-24-116-04 updated 2024-04-25 cvss 7.4

Honeywell Experion PKS, Experion LX, PlantCruise by Experion, Safety Manager, Safety Manager SC

Honeywell Experion LX <R511.5_TCU4_HF4, <R520.1_TCU5, <R520.2_TCU4_HF2 Honeywell Experion PKS <R510.2_HF14, <R511.5_TCU4_HF4, <R520.1_TCU5, <R520.2_TCU4_HF2 Honeywell PlantCruise by Experion <R511.5_TCU4_HF4, <R520.1_TCU5, <R520.2_TCU4_HF2 Honeywell Safety Manager R15x, >=R16x, <=R162.10 Honeywell Safety Manager SC R210.X, R211.1, R211.2, R212.1
affected: mitigation “Honeywell fixed the reported issues and advises users to upgrade to version referenced in the Security Notice or CVE record.” process.honeywell.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-04-24)

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Honeywell C300

Classification

Weakness

CWE-121 Stack-based Buffer Overflow

References

process.honeywell.com

Sources

CVE List CVE-2023-5407
NVD CVE-2023-5407

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary